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1. Department Address Laser Model Number Serial Number Chiller Model Number Serial Number eDrive Model Number Serial Number Laser Manufacture Date Total Laser Lifetime hours 2014 Northrop Grumman Systems Corporation 59 Patara IR TEMoo Laser User Manual Appendix A Customer Service Questions What is the coolant flow rate GPM What is the set temperature on the chiller C What is the coolant pressure on chiller PSI What are the set current and actual current from eDrive A Is Q switch enabled yes no Is Q switch triggered internally or externally What is the Q switch power percent Is FPS enabled yes no What are the FPS parameters What is the pulse repetition frequency kHz Is the output power measured directly from the laser yes no What is the measured power W When did the problem happen Have you changed any settings recently yes no Have you adjusted the laser to try to fix the problem yes no 2014 Northrop Grumman Systems Corporation 60 Patara IR TEMoo Laser User Manual Appendix A Customer Service What are the changes made recently to the system Please describe the problem or laser behavior as detailed as possible Suggestions Email or fax to Northrop Grumman Cutting Edge Optronics Inc 20 Point We
2. assembly must be properly prepared for shipment if internal damage is to be avoided due to possible freezing of coolant trapped in the lines This procedure follows 1 Ready a dry gas source in preparation for draining the system Oil free dry filtered air or N2 is recommended 2 Remove coolant connections from back of laser housing Connect a dry gas line to the Coolant Out connector on the housing Coolant lines must be purged in the proper direction or trapped coolant may remain in the lines inside the laser If this trapped coolant freezes it can cause lines to leak when operation is resumed 4 Connect a drain hose with a proper quick disconnect fitting to the Coolant in connector on the housing Purge the lines with for at least 1 2 hour at 5 psi 6 Remove purge lines After the laser is dry place it in a sealed ESD bag with a desiccant Package the laser securely in a shipping container You will need to remove all coolant from the chiller prior to shipment Refer to the chiller manufacturer s instructions Do not reconnect chiller lines to laser prior to shipment After shipment if antifreeze was used drain and clean the chiller Add a new filter and clean Optishield Plus coolant before reconnecting the chiller to the laser Purge Housing The Patara IR TEMoo optics assembly must be kept at low humidity to prevent the possibility of condensation on the laser diode arrays The Patara IR TEMoo housing provides a lev
3. consider replacing diodes or upgrade the laser Please contact NG CEO for detailed information Optimize Laser Performance Optimization of the laser may be required when the laser is initially installed or the laser performance has degraded due to aging laser diodes For this procedure a green light should be visible from the laser In the absence of any visible output please review Chapter 7 Troubleshooting or contact NG CEO for 2014 Northrop Grumman Systems Corporation 41 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance assistance To obtain the best performance small adjustments may optimize the laser To optimize the laser follow these steps 1 Wait for the laser reach thermal stabilization Both the laser bench temperature and environmental temperature significantly impact the laser power Wait for the laser to be thermally stabilized before attempting any adjustment 2 Check the settings of the eDrive and chiller Check the performance with all items set to the values on the laser ATP test report data summary Verify that all of the eDrive settings are correct The coolant flow rate and temperature have a significant impact on the laser performance Make sure that the flow rate is approximately 1 5 GPM and the temperature of the chiller matches results from the original test report 3 Peak the laser power by adjustment of chiller temperature The laser diode wavelength will slowly drift as the laser di
4. 1 320 cubic feet 2014 Northrop Grumman Systems Corporation 27 Patara IR TEMoo Laser User Manual Clearance Chapter 4 Installation and Operation Adequate clearance should be allowed on the front sides and rear of the chiller for access to connections and components The cabinet of the chiller is designed to vent air Maintain free space equal to the height of the chiller for flow of air on the condenser side of the chiller opposite to where the coolant lines connect The two sides or the top must have an equal amount of free space When air flow becomes impeded cooling capacity decreases and electrical efficiency drops as motor load increases Electrical Power An IEC power cord is provided with the Chiller It should be attached to the receptacle on the rear of the enclosure Make sure that the power outlet used for the Chiller is properly grounded and matches the voltage and frequency indicated on the identification label on the back of the Chiller For 208 230V 60 Hz Polyscience chillers with less than 1 5 horsepower the supplied power cord will be for connection to a NEMA 6 20 North America receptacle in accordance with local electrical codes A Euro cord will be supplied with 50Hz models The use of an extension cord is not recommended However if one is necessary it must be properly grounded and capable of handling the total wattage of the unit The extension cord must not cause more than a 10 drop in voltage to th
5. 28 3 0 4 9 5 15 7 20 2 23 9 27 0 29 6 32 0 34 1 36 0 40 26 0 2 6 12 7 19 1 23 8 27 6 30 7 33 5 35 9 38 0 40 0 If required to operate a laser in conditions near to the condensation temperature take precautions to keep the laser dry The laser should be operated inside an area that is purged with nitrogen N2 or encased in a sealed enclosure with a desiccant eDrive Nitro The eDrive Nitro is a menu driven diode driver and laser controller The eDrive Nitro regulates the diode drive current controls the acousto optic AO Q switch pulses and monitors the various interlocks The front panel provides an emergency stop button to halt laser output 2014 Northrop Grumman Systems Corporation 20 Patara IR TEMoo Laser User Manual Chapter 3 System Details WARNING The emergency stop should only be used in an emergency situation For normal operation use the shutter or emission buttons to halt laser output Additional information about the eDrive Nitro can be found in the eDrive User Manual 4x40 LCD o Ld Oo o a Power Soft Switch Keys 2014 Northrop Grumman Systems Corporation Selector Knob o D O O O Dedicated Keys Figure 3 5 eDrive Nitro Control Panel 21 Shutter Emission Keylock Emergency Switch Stop Switch Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation To ensure safe operation of t
6. 40 43 46 53 55 57 58 cleaning 26 condensation 15 16 18 43 contacting Cutting Edge Optronics ii coolant 4 5 13 40 cooling 4 14 Customer Service vii viii 50 51 57 D data summary See test report desiccant 16 18 39 40 41 42 43 51 Diode 29 E eDrive iii viii 3 4 5 10 15 18 19 20 21 24 30 33 35 36 38 45 46 52 53 54 55 56 57 58 emergency stop 18 19 end of life handling iv ESD v EU directives iv F filters 27 fuse 24 G ground chassis vi 2014 Northrop Grumman Systems Corporation Index H Hold Off 45 49 55 K Knowledge Center ii 26 L laser emission vi Laser Safety vii viii 6 module 44 50 51 N negative lens 34 O optimize 39 45 46 48 optimization 45 48 54 Optishield 14 32 40 P plumbing 14 27 power meter 34 45 49 53 PRF 36 37 54 62 purge 39 40 Q Q Switch 5 18 35 38 45 53 54 55 56 58 R RoHS iv S sales support ii 65 Patara IR TEMoo Laser User Manua Index SHG 16 62 test report 4 5 15 32 33 34 35 46 shock hazard vi symbols v W T Warning Labels 9 WEEE iv technical support ii 2014 Northrop Grumman Systems Corporation 66 Patara IR TEMoo Laser User Manual
7. Electrical Inputs eDrive Auto ranging 85 264 VAC 47 63 Hz Drawing 7A Cooling Closed Loop Re circulating Chiller Coolant Distilled Water with 10 Optishield Plus Operating Temperature 18 30 C Laser head size 26 Lx 6 1 H x 11 5 W eDrive Nitro Size 7 Hx 19 W x 17 7 D 1 Chiller must be able to circulate a minimum of 1 5 GPM of coolant at approximately 60 psi See the ATP test report data summary sheet supplied with the laser for the exact flow rate required The laser can be cooled with distilled water as long as a corrosion inhibitor and algaecide are added NG CEO recommends Optishield Plus Optics Subsystem The optical subsystem consists of an optical assembly on a NG CEO industrial laser optics bench The optical assembly is kinematically mounted to the housing Electronic Subsystem The electronic subsystem consists of a 4U sized eDrive see the eDrive User Manual for details Refer to Chapter 4 Installation and Operation to setup and operate the eDrive with the Patara IR TEMoo laser Contact NG CEO technical service if you need assistance Operation at reduced power requires that two settings be adjusted in the eDrive the Q switch Power and the drive current level Iset Your laser shipment includes the final ATP test report data summary that provides the values necessary to achieve the full power conditions 2014 Northrop Grumman Systems Corporation 5 Patara IR TEMoo La
8. IR TEMoo Laser User Manual About This Manual This manual describes the installation operation and service of the Patara IR TEMoo Laser System with the eDrive Nitro Laser Controller The manual consists of the following chapters Chapter 1 Introduction provides a theory of laser operation and a description of the Patara IR TEMo laser Chapter 2 Laser Safety describes proper safety procedures you should understand before operating the Patara IR TEM p laser Chapter 3 System Details provides information about components of a laser system and proper environmental conditions for operation Chapter 4 Installation and Operation discusses how to unpack setup and powering on your system for the first time Chapter 5 Maintenance provides information on proper maintenance of your laser system Chapter 6 Service provides resources to help fix problems with the Patara IR TEMoo laser Chapter 7 Troubleshooting provides possible solutions to the most commonly reported issues with the Patara IR TEM po laser Appendix A Customer Service provides information to expedite any service request before contacting NG CEO Appendix B System International Units identifies commonly used units of measurement found in this manual Appendix C Acronyms provides a list of commonly used abbreviations and their descriptions used throughout this manual 2014 Northrop Grumman Systems Corporation viii Patara IR TE Moo Lase
9. Set Frequency 5 Change the FPS settings Refer to Table 4 4 eDrive Settings and parameter FPS Delay Start Power FPS Window Length and FPS Modulation Type For additional FPS information refer to External Trigger and FPS in this chapter 6 Resume operation by pressing SHUTTER again The laser will resume operation with no audible warning and the button will be illuminated 7 Warm up for one hour not necessary if laser has been operating 8 Optimize laser per the Optimize Laser Performance section in Chapter 5 Maintenace Fine Tune Cavity Mirrors NOTE For lasers with more than 1000 hours of operation diode current and cooling fluid temperature may need to be optimized as well 2014 Northrop Grumman Systems Corporation 39 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation External Triggering and FPS The laser may be externally triggered using a TTL signal of 300 ns to 500 ns duration The signal may be input via the BNC connector labeled EXTERNAL TRIGGER on the back of the eDrive controller Figure 4 27 illustrates the RF signal output to the Q switch without first pulse suppression FPS and the laser pulse train with the first giant pulse If the peak power of these giant pulses is high enough it can cause the damage to the mirrors and the laser crystals The giant pulse forms when the lasing was stopped while the pumping light is still on during the laser processing c
10. bracket NOTE Threaded hose barbs and adapters should have threads wrapped 3 4 times with Teflon tape Figure 4 4 depicts the chiller with connected coolant hoses 2014 Northrop Grumman Systems Corporation 29 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation Figure 4 4 Chiller Assembled with Coolant Hoses and Filter Connections on Laser Head Figure 4 5 depicts the connectors on the rear panel of the Patara IR TEM laser All of the connectors are clearly labeled AF a COOLANT out a a Figure 4 5 Connectors on the rear panel of the Patara IR TEM oo laser 1 Plumbing Connection Push the barb fittings of coolant hose connectors gently into the COOLANT IN and COOLANT OUT ports by following the flow patch direction Wetting the o rings of the quick disconnect fittings and receptacles can prevent the o ring from being cut by the mating piece during insertion Make sure that the quick disconnect fittings are locked A click is heard once it is locked 2014 Northrop Grumman Systems Corporation 30 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation Figure 4 6 Plumbing Connection 2 Signal Connection Align the female connector of the laser signal cable to the J1 connector on the laser head Once it is aligned the connector can be pushed in Turn the locking ring of the connector in the clockwise direction until it is locked L 6s Figure 4 7 Signal Connecti
11. eDrive be equipped with feet to prevent the driver from marring the surface when it is moved The eDrive must be secured Adequate clearance should be allowed on the front sides and rear of the eDrive for access to connections and components The front and rear vents of the eDrive must be a minimum of 24 inches 61 cm away from walls or vertical surfaces so air flow is not restricted 2014 Northrop Grumman Systems Corporation 26 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation Chiller Setup Ambient Temperature and Relative Humidity Location The chiller is designed for indoor installation in ambient temperatures between 5 C and 30 C 41 F and 86 F Relative humidity should not exceed 80 percent non condensing The Chiller should be installed on a strong level surface and be located as close to possible to the laser It should not be installed closer than 4 feet 1 4 meters to a heat generating source such as heating pipes or boilers If possible the chiller should be located near a suitable drain to prevent flooding in the event of leaks Do not place it where corrosive fumes excessive moisture or dust or high room temperatures are present For ease of positioning and maneuverability the chiller is supplied with casters The front wheels can be locked to keep the chiller in place while in use To help prevent voltage drops position the chiller as close as possible to the power distributio
12. facilities that can restore your instrument to peak performance without delay When calling for service in the U S dial 636 916 4900 follow prompts for department directory To phone for service in other countries contact your sales agent This chapter provides reference to types of customer service needs Contacting customer service Laser Module replacement Return the instrument for repair 2014 Northrop Grumman Systems Corporation 52 Patara IR TEMoo Laser User Manual Chapter 6 Customer Service Contacting Customer Service To expedite your service needs please complete the questionnaire in Appendix A Customer Service before you contact NG CEO Technical Service Complete the questionnaire with as much detail as possible and retain a copy for your records E mail or fax the form to NG CEO refer to the second page of this manual for contact information and notify your customer service representative that it has been sent Laser Module Replacement The laser module can be replaced by a trained service engineer Contact NG CEO for Laser Level 2 training and access to Level 2 maintenance instructions Return the Instrument for R epair A return merchandise authorization RMA is required prior to shipping any instruments to NG CEO Contact NG CEO or your local distributor for RMA and shipping instructions CAUTION Failure to obtain proper shipping instructions may result in damage to the instrument Use the
13. in the laser beam path except for the negative lens and Q Switch Q Switch Set FPS Settings Channel 1 Channel 1 Fault Setup Set Trig Out Mode Shutter Setup Marking Mode Setup power meter 2014 Northrop Grumman Systems Corporation 36 Parameter Internal Trigger Q Switch QS Setting or Value Enabled Enabled Set Frequency refer to ATP test report Set Window Width 5 us Set Q Switch Power FPS 100 Enabled FPS Mode Standard FPS Delay refer to ATP test report Start Power refer to ATP test report FPS Widow Length refer to ATP test report FPS Modulation Type refer to ATP test report PPK Open Offset 0 PPK Closed Offset Channel 1 0 Enabled Set Current refer to ATP test report Set Standby Current refer to ATP test report Set Slew Rate refer to ATP test report Slew Control Enabled Set Current Limit Set Voltage Dropout refer to ATP test report 20 V Set Current Tolerance Enabled Set Current Tolerance Trig out mode Shutter FPS Shutter Speed Closed to Standby LM Active Gate Active FPS Active Patara IR TEMoo Laser User Manual QSW Active High Enabled Enabled 4A Ww Chapter 4 Installation and Operation WARNING Wear proper laser safety eyewear to protect your eyes 5 Once all the parameters are set correctly and temperatures is stabilized set th
14. of simple structure related to a fundamental Gaussian intensity profile mode which is of the smallest lateral extent and divergence in the set Somewhere in the oscillator path is an aperture which forms the limit to the laser beam s transverse spatial extent It is advantageous for achieving the ultimate power and efficiency from a given laser system for this aperture to coincide with the aperture of the amplifier medium so that the oscillating beam fills the gain medium to the maximum extent If the diameter of the fundamental mode is much smaller than the limiting aperture higher order modes will oscillate and laser beam quality will degrade because these modes have not only a larger transverse extent but also have higher divergence than the fundamental mode Beam quality is therefore related to the product of the diameter of the beam and its angular divergence as it propagates into the far distance and this product is conserved with propagation and transformation by optical elements such as lenses and mirrors Beam quality is also a measure of how small of a spot a beam can be reduced by simple focusing higher quality beams give focal spots of smaller diameter and higher intensity The subject of laser cavity design for fundamental mode operation is too involved to pursue here but it involves the selection of cavity length and the characteristics of the pumped amplifier medium s diameter and focal power It is important to recognize that once t
15. or obtain a copy of the complete warranty statement please contact your nearest NG CEO sales and service office EXCEPT AS PROVIDED IN THIS SUMMARY OR THE APPLICABLE WARRANTY STATEMENT NG CEO MAKES NO WARRANTY OF ANY KIND EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUPOSE IN NO EVENT SHALL NG CEO BE LIABLE FOR INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES Copyright Under the copyright laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of NG CEO Trademarks Patara eDrive eDrive Nitro and Timing Engine are registered trademarks of Northrop Grumman Corporation Patents Northrop Grumman Corporation products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specifications and price change privileges reserved Export This laser product is regulated by the Export Administration Regulations EAR of the USA It may not be export re export without the prior written approval of the Bureau of Industry and Security U S Department of Commerce 2014 Northrop Grumman Systems Corporation il Patara IR TEMoo Laser User Manual Safety Information Product End of Life Handlin
16. packing boxes supplied by NG CEO to ship your instruments If shipping boxes have been lost or destroyed replacements are available for a nominal charge from NG CEO Remove all coolant from laser prior to packaging for shipment see Chapter 5 Maintenance for details Place a desiccant in a sealed ESD bag with the laser and secure the laser in the shipping container WARNING Damage from residual coolant due to condensation or expansion can be catastrophic to the diode arrays or laser rod if not dealt with properly Such damage is excluded from warranty coverage 2014 Northrop Grumman Systems Corporation 53 Patara IR TEMoo Laser User Manual Chapter 7 Troubleshooting This chapter is intended to provide possible solutions to common problems encountered with the Patara IR TEM laser during normal use WARNING Do not attempt repairs while the unit is under warranty Complete the form in Appendix A and report problems to NG CEO for repair The following sections can be found in this chapter Jnitial checklist Laser output power eDrive Operation 2014 Northrop Grumman Systems Corporation 54 Patara IR TEMoo Laser User Manual Chapter 7 Troubleshooting Initial Checklist Before adjusting or attempting troubleshooting procedures verify the following Additional information is available in the troubleshooting guide that was supplied with your laser Verify the eDrive is operating at the correct output current a
17. po laser has connectors for cables These cables connect to the eDrive Nitro The back panel also has ports for the coolant in and coolant out Purge Valve Opening Figure 3 2 Patara IR TEMooRear View Also located on the front and back panels are alignment openings The openings are sealed by screws which prevent emission during normal operation However the service 2014 Northrop Grumman Systems Corporation 13 Patara IR TEMoo Laser User Manual Chapter 3 System Details technician can remove the screws and shine a HeNe laser through the opening to aid alignment WARNING The screw filling the alignment hole is considered non interlocked cover If the screw is not replaced and the Patara IR TEM laser is running the opening will function as an aperture It can allow an output beam of up to 3 W at the same rep rate and pulse width as the main beam This beam would be capable of causing eye or skin damage from direct exposure or specular reflection of the beam Always replace the screw in the alignment hole Also to aid in aligning the laser there are adjustment holes in the top cover of the laser housing to allow a technician to access the adjustment screw on the HR cavity mirror and OC cavity mirror The following images show the position and use of each adjustment screw The holes to access these adjustments are always open to air there are no screws to block these holes as they are not in the direct beam path WARNING The acce
18. procedures in Chapter 5 Maintenance Sections included in this chapter include Safety Overview Precautions for Safe Operation CDRH Compliance 2014 Northrop Grumman Systems Corporation 7 Patara IR TEMoo Laser User Manual Chapter 2 Laser Safety Safety Overview Safe operation of any laser should be reviewed prior to any new installation of the Patara IR TEM po laser CAUTION The Patara IR TEMo laser is a Class IV high power laser whose beam is by definition a safety hazard Avoid eye or skin exposure to direct or scattered laser radiation Avoid direct viewing of the beam or its specular reflection Follow the instructions contained in this manual for proper installation and safe operation of your laser We recommend the use of protective eyewear at all times the type of eyewear depends on the energy and wavelength of the laser beam and operating conditions Consult ANSI ACGIH or OSHA standards for guidance CAUTION Use of controls adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure WARNING At all times during installation operation maintenance or service of your laser avoid exposure to laser or collateral radiation exceeding the accessible emission limits listed in Performance Standards for Laser Products U S Code of Federal Regulations 21 CFR 1040 10 d Precautions for Safe Operation Avoid looking directly into the la
19. 1 CFR 1040 as applicable Made in the USA DANGER Non Interlocked Protective Housing DANGER Laser radiation when open AVOID EVE ORISKINEKPOSURE TO Non Interlocked Protective Housing Label DIRECT OR SCATTERED RADIATION Defeatably Interlocked Protective Housing DANGER Laser radiation when open and interlock defeated AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED Defeatably Interlocked Protective Housing Label RADIATION Class IV Laser Danger Label Figure 2 2 Warning Labels 2014 Northrop Grumman Systems Corporation 11 Patara IR TEMoo Laser User Manual Chapter 3 System Details This chapter discusses the details of the Patara IR TEM p laser Patara IR TEMpop laser Closed Loop Chiller eDrive Nitro 2014 Northrop Grumman Systems Corporation 12 Patara IR TEMoo Laser User Manual Chapter 3 System Details Patara IR TEMoo Laser The Patara IR TEMoo laser head measures 26 in L by 11 in W by 6 13 in H not including the connectors at the rear of the laser The side of the Patara IR TEM laser has a laser emission indicator The laser can be configured for either right hand or left hand output Please contact NG CEO for information regarding the location of the laser beam for your application Laser Emission Light a a CA m a a i gt IPN o og o rr AA QA Right Hand Optional Left Hand Output Window Output Window Figure 3 1 Patara IR TEMoo Front View The rear panel of the Patara IR TEM
20. 4 Northrop Grumman Systems Corporation 49 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance ACCESS HOLES FOR OC MIRROR ADJUSTMENT 5 a 8 ise A CLOCKWISE MOVE BEAM TO RIGHT COUNTER CLOCKWISE MOVE BEAM TO LEFT CLOCKWISE MOVE BEAM DOWN COUNTER CLOCKWISE MOVE BEAM UP LASER OUT x CLOCKWISE MOVE BEAM DOWN COUNTER CLOCKWISE MOVE BEAM UP CLOCKWISE MOVE BEAM TO RIGHT COUNTER CLOCKWISE MOVE BEAM TO LEFT ACCESS HOLES FOR HR MIRROR ADJUSTMENT Figure 5 5 Accessible Holes for HR and OC Mirror Adjustment e Optimize power Make small adjustments to the horizontal angle of HR mirror and observe the output power Once a maximum is found adjust the vertical control of HR mirror to maximize power Make small adjustments to the horizontal angle of OC mirror and observe the output power Once a maximum is found adjust the vertical control of OC mirror to maximize power Repeat the optimization steps with both the HR and OC until there is no significant performance improvement If the laser is still not within 5 of the original power or not stable repeat the eDrive current optimization and HR OC adjustment until there is no significant performance improvement Ifthe laser power can t be restored to the specification or the laser is not stable then the walking the cavity procedure can be tried Walking the cavity is sometimes required to optimize the laser and i
21. 4 Northrop Grumman Systems Corporation 56 Patara IR TEMoo Laser User Manual Chapter 7 Troubleshooting eDrive Operation The following issues may occur in relation to the Patara IR TEMop laser CW Power Only No Optical Pulsing Perform initial check on system CW power only or absent optical pulsing is typically caused by the wrong settings or an eDrive problem Verify settings listed in Chapter 4 Installation and Operation or refer to the eDrive User s Manual section on troubleshooting for procedures and details Hold Off Failure Perform initial check on system This problem can be Q switch low power fault on the eDrive Refer to the eDrive User s Manual section on troubleshooting for procedures and details Hold off failure can be caused by a failing QSW This requires the internal laser be repaired Occasionally a re tuned laser can suffer from hold off loss To remedy change the angle of the QSW Since QSW angle cannot be adjusted outside the laser internal service will be required The eDrive has built in diagnostics to alert the user of fault conditions Common error reports and suggested remedies follow Consult the eDrive User Manual for more details Chiller Fault Detected Flow Interlock Fault Check chiller for operation and low coolant level Hardware Fault Detected Check that the Emergency Stop button is not depressed Check INTERLOCK input on back panel for open condition Cover Interlock Fault Det
22. 55 57 59 60 62 63 65 Patara IR TEMoo Laser User Manual List of Figures and Tables List of Figures and Tables Figure 1 1 Typical System Block Diagram 3 Table 1 1 Typical Performance of a Standard Patara IR TEMoo Laser 4 Table 1 2 Other Specifications Table 5 Figure 2 1 Example of Radiation Control Drawing 10 Figure 2 2 Warning Labels 11 Figure 3 1 Patara IR TEMoo Front View 13 Figure 3 2 Patara IR TEMoo Rear View 13 Figure 3 3 Patara IR TEMoo Top View 14 Table 3 1 Heat Capacity and Minimum Flow Rate 15 Table 3 2 Cooling System Requirements 16 Table 3 3 Avoid with Chillers 16 Figure 3 4 Constant Dew Point Lines for Ambient Temperature and Relative Humidity 19 Table 3 4 Table of Air Condensation Temperature at Given Ambient Air Temperature Celsius and Relative Humidity percent 20 Figure 3 5 eDrive Nitro Control Panel 21 Figure 4 1 Components for the Patara IR TEMoo Laser 23 Figure 4 2 Basic setup for the laser power test 25 Table 4 1 Recommended Fuse Ratings 26 Figure 4 3 Coolant Hoses and Filter Connections 29 Figure 4 4 Chiller Assembled with Coolant Hoses and Filter 30 Figure 4 5 Connectors on the rear panel of the Patara IR TEMoo laser 30 Figure 4 6 Plumbing Connection 31 Figure 4 7 Signal Connection 31 2014 Northrop Grumman Systems Corporation xi Patara IR TEMoo Laser User Manual List of Figures and Tables Figure 4 8 Diode Power Connection 31 Figure 4 9 RF Connection 32 Figure 4 10 Lase
23. User Manual Patara IR TEMoo Laser PA 020 QTIP February 2014 NORTHROP GRUMMAN CEO UMAN 0045 Rev B Worldwide Technical Support and Product Information http www northropgrumman com Business Ventures CEO Pages Service aspx http www ngceoservice com Knowledge Center Hours 8 00 a m to 5 00 p m Central time Technical Support 636 916 4900 follow prompts for department directory Email ngceoservice ngc com Cutting Edge Optronics Headquarters 20 Point West Blvd St Charles MO 63301 USA Sales Support 636 916 4900 follow prompts for department directory After office hours please leave a voice mail message Outside North America contact a Cutting Edge Optronics sales office or distributor see the Cutting Edge Optronics website for a list of offices 2014 Cutting Edge Optronics a strategic business unit of Northrop Grumman Systems Corporation All rights reserved 2014 Northrop Grumman Systems Corporation i Patara IR TEMoo Laser User Manual Important Information Warranty Summary Northrop Grumman Cutting Edge Optronics NG CEO warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of one year from the date of shipment from an NG CEO distributor If a product proves defective within the respective period NG CEO will provide repair or replacement as described in the complete warranty statement To arrange for service
24. ately 2014 Northrop Grumman Systems Corporation V Patara IR TEMoo Laser User Manual Laser Emission Use caution Shock Hazard Use caution Caution Risk of danger Refer to manual Chassis Ground 2014 Northrop Grumman Systems Corporation vi Patara IR TEMoo Laser User Manual General Safety Summary The Patara IR TEMoo Laser System emits laser radiation that can permanently damage eyes and skin ignite fires and vaporize materials Chapter 2 Laser Safety contains information and guidance about these hazards To minimize the risk of injury or expensive repairs carefully follow these instructions Do not attempt to operate the laser system before carefully reading this complete operation manual If you have any questions on the product that have not been discussed sufficiently in this manual contact the manufacturer for complete instructions Failure to heed this warning may result in the destruction or serious damage to the device and will void the product warranty The Service and Troubleshooting sections are intended to help guide you to the source of problems Do not attempt repairs while the unit is under warranty instead report all problems to NG CEO for warranty repair Use the form in Appendix A Customer Service to describe issues with the laser We also suggest that you record information about the laser such as power settings time and date 2014 Northrop Grumman Systems Corporation vil Patara
25. de arrays can seriously damage the laser and may void warranty 2014 Northrop Grumman Systems Corporation 18 Patara IR TEMoo Laser User Manual Chapter 3 System Details Constant Dew Point Lines for Ambient Temperature and Relative Humidity 12 C 16 C 2 24 C 28 C 100 ae Relative Humidity 10 13 16 19 22 25 28 31 34 37 40 Temperature C Figure 3 4 Constant Dew Point Lines for Ambient Temperature and Relative Humidity 2014 Northrop Grumman Systems Corporation 19 Patara IR TEMoo Laser User Manual Chapter 3 System Details Table 3 4 Table of Air Condensation Temperature at Given Ambient Air Temperature Celsius and Relative Humidity percent Relative Humidity 1 10 20 30 40 50 60 70 80 90 100 10 43 9 20 2 11 9 6 8 3 0 0 1 2 6 4 8 6 7 8 4 10 0 12 42 6 18 7 10 3 5 0 1 2 1 9 4 5 6 7 8 7 10 4 12 0 16 40 2 15 6 7 0 1 6 2 4 5 6 8 2 10 5 12 5 14 4 16 0 18 39 0 14 1 5 3 0 2 4 2 7 4 10 1 12 4 14 5 16 3 18 0 22 36 6 11 0 2 0 3 6 7 8 11 1 13 9 16 3 18 4 20 3 22 0 24 35 4 9 5 0 4 5 3 9 6 12 9 15 7 18 2 203 22 3 24 0 Air Temperature C 28 33 0 6 5 2 9 8 8 13 1 16 6 19 5 22 0 24 2 26 2 28 0 30 31 8 4 9 4 6 10 5 14 9 18 4 21 4 23 9 26 2 28 2 30 0 34 29 5 1 9 7 8 13 9 18 5 22 1 25 1 27 7 30 0 32 1 34 0 36
26. e current to 10 A and press the EMISSION button 6 Press the SHUTTER button to open the laser shutter Gradually increase the current up to slightly above the threshold Move the negative lens and power meter so that the beam is going through the center of the lens and hitting the center of the power meter 7 Gradually increase the current set point to the operating current specified in the ATP test report Don t touch any part of the laser and wait for the laser to stabilize for 1 hour usually the laser takes around 20 minutes to reach 95 of the maximum power Then check if the power is close to the result on the test report 8 Usually the laser needs optimization for the first installation due to the slight differences of environments chiller settings and vibration of the transportation If so please follow the laser performances optimization procedures in Chapter 5 Maintenance Daily Operation Output energy and repetition rate of the Patara IR TEMo laser system are adjustable over a wide range However operating protocols must be observed to assure operation without risking internal damage to optical components CAUTION The output beam of this system is a safety hazard Avoid viewing the beam directly Turn On Procedure 1 Switch the chiller to the ON position Verify correct flow rate and temperature setting to value specified on laser ATP test report data summary Wait until the chiller has achieved proper temperat
27. e Chiller CAUTION The chiller has been set 208 230 Volts at the factory for 60 Hertz single phase or 200 volts for 50 Hertz single phase High voltages out of the specified range could damage the chiller WARNING DO NOT plug the Chiller into the electrical outlet until the unit is ready for Startup Chiller Cleaning Procedures Please follow the proper procedures to clean the chiller before it is connected to the laser head Refer to section Clean and Maintain Chiller in Chapter 5 Maintenance for details Chiller maintenance procedures are also available through the NG CEO Knowledge Center 2014 Northrop Grumman Systems Corporation 28 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation WARNING Make sure that the chiller will not contaminate the laser head Connecting the Chiller Coolant Hoses and Filter Connections The required coolant hoses filters and fittings are included in the plumbing kit that was shipped with your laser They should be connected as illustrated in Figure 4 3 The correct coolant flow path starts with the supply port of the chiller gt filter gt coolant in port of laser head gt laser head gt coolant out port of laser head gt return port of the chiller Please be aware of the flow direction of the filter Figure 4 3 Coolant Hoses and Filter Connections The filter may be attached to the back of the chiller customer s equipment or a wall using the provided L
28. e current limit of the eDrive is set at the maximum operating current The limits need to be increased as the laser diodes age 2014 Northrop Grumman Systems Corporation 48 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance Power vs Current Lae m e Sz m p v z e a gt Q 3 e wn 24 24 5 Operating Current A Figure 5 4 Example of Laser Performance Dependence on the Operating Current 5 Peak up the laser with adjustment of the cavity mirrors WARNING Making mirror adjustments can be non reversible Do this step only when all the steps above have been completed and the laser does not meet the specifications with the correct settings a Locate the access holes for high reflection HR and Output Coupler mirrors OC Notice the positions of HR and OC mirrors with respect to the direction of the laser output in Figure 5 5 b Remove screws from access holes only in a dust free environment c Use a 1 8 inch ball driver to make adjustments A fine adjustment is a 1 degree or less rotation A small adjustment is about a 2 degree rotation A coarse adjustment is 15 degrees to 20 degrees rotation If coarse adjustments are needed to obtain performance reduce operating current by 1A Return to normal operating current when making small and fine adjustments d The screws for the adjustments of the vertical tilt angle and the horizontal tilt angle are illustrated in Figure 5 5 201
29. ected Verify that the cover is secure on the laser Check cable connections to laser Q Switch Driver Over Temp Fault Verify the cooling fan for the RF driver is operational Verify that the airflow through the driver is not obstructed This fault will not clear until the RF driver has had time to cool down 2014 Northrop Grumman Systems Corporation 57 Patara IR TEMoo Laser User Manual Chapter 7 Troubleshooting Q Switch HVSWR Fault Check RF cable connection to laser Perform RF output power check The Q switch has failed if the measured RF power is around 25 W with 50 Q RF dummy load Contact NG CEO for repair Q Switch Low Power Fault Perform RF output power check Verify voltage to RF driver Adjust RF power if needed Channel Over Temperature Fault Verify the eDrive fans are operational Verify that the airflow through the driver is not obstructed 2014 Northrop Grumman Systems Corporation 58 Patara IR TEMoo Laser User Manual Appendix A Customer Service This form has been provided to encourage you to tell us about any difficulties you may have experienced while using your NG CEO instruments or user manuals Call or write our customer service department to bring attention to problems that you may not have personally experienced We are always interested in improving our products and manuals and we appreciate all suggestions Date Name Company or Institution
30. el of protection from entry of ambient humidity but it is not hermetically sealed When operating in a high ambient humidity precautions need to be taken to keep the interior of the housing dry The lid of the housing has a port for a desiccant cartridge which should be changed when the cartridge indicator is no longer blue Also the housing interior can be purged with clean dry air using the valve on the rear of the housing The inlet line is the stemmed valve and is opened and closed by rotating the knob on the valve end Please contact NG CEO before attempting this procedure CAUTION The clean dry air input line must be on a pressure regulator and the line must be filtered 2014 Northrop Grumman Systems Corporation 42 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance Replace Desiccant Cartridge The desiccant cartridge removes excess moisture from inside the laser head It is located on the lid of the Patara IR TEM po laser head The desiccant cartridge must be replaced regularly so it should be checked at least weekly for exhaustion Exhaustion is indicated by a change in the color of the indicator paper in the top of the cartridge While any sector of the indicator paper in the cartridge top remains blue the cartridge can still absorb water When all sectors of the indicator paper turn completely white or light pink the cartridge has absorbed all the water it can and must be replaced Replacement frequency varies with the
31. emove the retainer ring and exchange the desiccant The refill package contains 50 grams of desiccant Fill the cartridge to the surface that the filter rests on Do not overfill Make sure that there are no desiccant beads on the surface that the filter rests on Install the paper filter then the screen then the retainer ring Hand tighten the retainer ring with the refill tool Replace the desiccant cartridge immediately to minimize the amount of time that the desiccant cartridge is removed from the laser housing Tighten the desiccant cartridge by hand DO NOT OVERTIGHTEN 2014 Northrop Grumman Systems Corporation 44 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance TY 50 GRAMS GM CONTAINER CONTROLS Figure 5 3 50 Gram Refill and Refill Tool WARNING Do not operate the laser without a functional desiccant cartridge Condensation on the diode arrays or other optics can seriously damage the laser and may void warranty Clean and Maintain Chiller The 5 um filter and coolant in the chiller should be replaced at least monthly Comply with your chiller manufacturer s recommendation if more frequent The color of the filter and coolant hose are pretty good indicators for the coolant quality The coolant hose should be clear and the filter white If not the chiller needs maintenance Drain and re fill the chiller per the chiller and coolant manufacturer s instructions The chiller must run continuously to prevent b
32. ems Corporation 33 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation 6 Interlock Shorting BNC Connection Connect the 3 BNC shorting connectors to TRIGGER GATE IN QSW THERM INTLK and INTERLOCK as shown below Desc Figure 4 15 BNC Interlock Connection PolyScience 6000 Series Power Up Procedure Usually NG CEO supplies the chiller with the laser If customer purchases the chiller by themselves the chiller has to be cleaned properly per manufacture s instruction before it is connected to the laser head Assuming the coolant hose filter and laser head are properly connected the following steps indicate how to turn on the cleaned PolyScience 6000 series for the first time 1 Fill the reservoir Remove the filler cap from the reservoir and using a funnel add fill the reservoir with a mixture of 10 Optishield Plus and distilled water until it reaches the MAX line on the reservoir s fluid level gauge When full remove the funnel but do not replace the cap at this time WARNING Do not use untreated de ionized water in the system as it is aggressive in nature and can attack and corrode the metals in the laser head 2 Connect the electrical power Plug the chiller s power cord into an appropriate electrical outlet Place the Circuit Breaker Power Switch on the rear of the instrument enclosure to the On position Three decimal points appear on the temperature display two decimal points appear on the pr
33. en the gain of the amplifier is sufficient to overcome the losses in the optical cavity One such loss is the amount which is allowed to escape the oscillator cavity through one of its mirrors and constitutes its useful output The Nd YAG laser amplifier is capable of storing a considerable amount of energy due to the long upper state lifetime of the Nd ion If some kind of device is used to prevent the buildup of optical power in the oscillator cavity by introduction of loss greater than the available gain energy will accumulate in the gain medium If this same device suddenly removes this loss the laser power will increase exponentially with each round trip of the oscillator cavity until much of the stored energy is exhausted and the gain once again falls below the loss The fact that the time for light to transit the laser cavity is only a few nanoseconds results in this stored energy being released in a very short duration pulse Such a device is called a Q switch and they are available in two major types acousto optic and electro optic The Patara laser uses an acousto optic Q switch to form its pulses The high peak power is achieved in this manner The laser beam which can circulate inside the oscillator cavity is determined by a process of self consistency where the beam characteristics at any given location in the cavity are repeated after the beam completes a round trip back to that location Oscillator beams are composed of transverse modes
34. ent to standby Once the continuity of the interlock is satisfied the laser will ramp up the power automatically For other interlock configurations please contact NG CEO CAUTION Never look at the laser beam even it is off because the laser beam will ramp up the power automatically Shut Down Procedure oe aS SS SS Press SHUTTER button to stop lasing Gradually decrease operating current to zero Press EMISSION on the eDrive to cease diode emission Press and hold POWER on the eDrive for 5 seconds until the display turns dark Turn the eDrive power enable key switch to OFF Let chiller run for 1 to 2 minutes Turn off the chiller For detailed operating instructions please refer the eDrive User Manual 2014 Northrop Grumman Systems Corporation 38 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation Adjusting the Laser System WARNING The Shutter must be closed before adjusting the PRF Adjusting the PRF while the laser is operational may result in optical damage Change the PRF 1 Press SHUTTER button to stop lasing The button will blink indicating the shutter is closed and the current is reduced to the standby current level 2 See the ATP test report data summary for the maximum current setting associated with PRF 3 Change the eDrive current setting Refer to Table 4 4 eDrive Settings and parameter Set Current 4 Change the eDrive PRF Refer to Table 4 4 eDrive Settings and parameter
35. erature that allows water to form from the ambient water vapor The dew point is dependent on the surrounding air temperature and relative humidity If a surface such as a laser diode is cooled at or below the condensation temperature water may collect on that surface A formula for calculating dew point is given below along with a calculated table All temperatures are given in Celsius 2014 Northrop Grumman Systems Corporation 17 Patara IR TEMoo Laser User Manual Chapter 3 System Details Condensation Temperature r 237 7xa T RH 17 27xT x a T RH n 17 27 a T RH Where 237 74 T 100 T is the ambient air temperature in degrees Celsius 0 lt T lt 60 RH is the relative humidity in percent 1 lt RH lt 100 Ty is the air condensation temperature For example suppose your chiller is running at 22 C and the ambient air temperature near the laser is 28 C 82 F Referring to Figure 3 4 and Table 3 4 find the intersection of the 28 C air temperature and the curve for the 22 C diode temperature At a relative humidity of 70 percent or greater condensation will form on the laser diodes Controlling the humidity level inside the laser is important to extend the lifetime of SHG crystal The desiccant cartridge on the top cover can help to removes excess moisture from inside the laser head WARNING Do not operate the laser without a functional desiccant cartridge Condensation on the dio
36. essure flow rate display 3 Start process fluid flow Press the Power button on the front panel The system startup sequence begins The pump turns on and fluid begins circulating through the system The set point temperature appears briefly on the temperature display After a few seconds it will be replaced by the actual fluid temperature The compressor will begin operating 15 to 20 seconds after power up 4 Check for leaks Once the pump is turned on check all of the connectors to see if there is any leakage If leakage is observed turn off the pump immediately and fix the leak The reservoir s fluid level will drop as the process and or process cooling lines fill with fluid Slowly add fluid to the reservoir until the liquid level remains stable 2014 Northrop Grumman Systems Corporation 34 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation 5 Replace reservoir cap First Time Laser Power Up Procedure Remove the cap that protects laser output window and make sure the window is clean If not gently clean it with a lens tissue and methanol Verify Chiller Settings 1 Turn on the chiller 2 Check the temperature setting of the chiller Refer to the ATP test report data summary included in your Patara IR TEM p laser shipment for the coolant operational temperature The chiller s temperature setting should be the same as in the report If it is set to a different temperature change it to match the set
37. g NG CEO is committed to protecting the environment In accordance with the Waste Electrical and Electronic Equipment directive WEEE and Restriction of Hazardous Substances in the European Union RoHS EU directives NG CEO accepts the return of our products for disposal When you are ready to reclaim the instrument you must properly transfer it according to local regulations concerning WEEE equipment Contact NG CEO Hor your local distributor for shipping instructions Please package the products as directed for a return for repair ROC ROHS Declaration In accordance with the Clause 6 2 of Marking for Control of Pollution Caused by Electronic Information Products SJ T11364 2006 for Measures for the Administration on Pollution Control of Electronic Information Products No 39 Order of the Ministry of Information Industry of the Peoples Republic of China NG CEO includes the following translation about our laser modules a tE Northrop Grumman Cutting Edge Optronics PG Ab 20 Pointe West Bivd St Charles MO 63301 USA RE BH Mirus Series Laser Systems Models Mi xxx xxxx xxxx and AMI xxx 20xx 00x HRASMARLARUR J ARAMARK E E So NM Sane Se B PPS FP ee Ahad Pb Cd Cr 1 PBB P3DE x Bm AR Be wk BERS EEN ELE FEM FAM FEH M A AANE Hite 16 eG Ri ee Bt uA EHHA t EN AM tata W RR Wt Oe Phe o B id arm o o oj oOo O
38. he Patara IR TEMoo laser system please read the Chiller User Manual and eDrive User Manual This chapter covers Laser system components Unpacking the laser system Laser head setup eDrive setup Chiller setup Connecting the chiller PolyScience 6000 series power up procedure as example First Time Laser Power up procedure Daily operation Adjusting the Laser System External Triggering and FPS The purchaser is responsible for any loss and injury during installation and use of the laser system NG CEO recommends that a qualified service technician install and maintain the laser If you intend to service the laser yourself please follow the following procedures 2014 Northrop Grumman Systems Corporation 22 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation Laser System Components Before installing the laser be familiar with the components of the laser system see Figure 4 1 Laser head Chiller eDrive SSS Ieee Diode Power Cable AC Power Cables Q Switch RF Cable Filter housing and Filter Hose for Chiller Figure 4 1 Components for the Patara IR TEMooLaser Unpacking the Laser System Your NG CEO Patara IR TEM po laser was carefully packed for shipment If its carton appears to have been damaged in transit have the shipper s agent present when you unpack Inspect the unit as you unpack it looking for dents scratches or other evidence of damage If
39. he design parameters are selected for optimum fundamental mode operation they cannot be altered without perturbing the fundamental 2014 Northrop Grumman Systems Corporation 2 Patara IR TEMoo Laser User Manual Chapter 1 Introduction mode size in the amplifier which may lead to unacceptable changes in performance This is particularly important to the intensity of amplifier excitation pump power or drive current since this also determines its focal power Consequently the amplifier drive current must be kept at all times within a close tolerance of the design point Suppose however that it is necessary to turn the laser output power down from its maximum design value From the reasoning above one cannot just turn the power down to the amplifier thereby reducing its gain without unacceptable alterations in the beam characteristics because this is invariably accompanied by a change in its focal power While it is always possible to attenuate the beam externally to the laser oscillator cavity this is undesirable since it involves additional optical elements and expense A corresponding reduction of power however is possible if we could turn up the loss of the optical cavity while maintaining the gain at a constant level The Patara IR TEMoo laser achieves power reduction using the latter method The additional functionality of accepting and executing power level commands is built into the accompanying eDrive electronic system System Descr
40. humidity in your operating environment and if the laser head is opened WARNING Waiting to replace desiccant until all sectors on desiccant cartridge have turned white will result in optical damage If the desiccant cartridges are exhausted in a short time frame e g two weeks without the laser head having been opened contact NG CEO technical service A second desiccant cartridge is recommended to reduce the time the desiccant cartridge is removed from the Patara IR TEMoo laser cover during service Any spare desiccators should be stored in a cool dry area A nitrogen purged dry box is recommended for storage Two types of desiccant cartridges are used in Patara IR TEMoo lasers depending on the build date 40 Gram Desiccant Cartridge The 40 Gram Desiccant cartridge Figures 5 1 and 5 2 is used on Patara IR TEMoo lasers built November 2013 and later 2014 Northrop Grumman Systems Corporation 43 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance Figure 5 1 40 Gram Desiccant Cartridge Top Figure 5 2 40 Gram Desiccant Cartridge Bottom To service the desiccant the following supplies are required Desiccant supplies can be purchased from NG CEO or directly from AGM Container Controls Inc telephone number 800 995 5590 Desiccant cartridge NG CEO part no 42 228 Refill part number 643665 Refill tool 980412 Remove the desiccant cartridge from the top cover of the laser housing Use the refill tool to r
41. ills to the top of the reservoir to ensure all wetted surface areas of the chillers are cleaned Cycle the chiller on and off Top off the reservoir as necessary to ensure it is full of the cleaning solution Ensure that the cap of the chiller reservoir is loose or remove it completely to allow gas to escape from the system Circulate the cleaning solution through the system including the laser module for 40 minutes 8 Drain the cleaning solution mixture from the chiller as detailed in steps 1 and 2 10 11 12 13 14 15 Refill and circulate distilled water for 5 minutes and drain Ensure that the cap of the chiller reservoir is loose or remove it completely to allow gas to escape from the system Drain the chiller and dispose of the filter Disconnect the chiller from the laser module and blow out water from the laser module coolant loop prior to refilling the chiller coolant reservoir Reconnect the laser module coolant loop Install new 5 micron filter into housing Record cleaning date on sticker with a one month reminder to drain amp clean the system Affix sticker to chiller or cabinet Refill the chiller reservoir with Optishield plus and distilled water coolant following the manufacturer s directions Run for 30 minutes with the cap loose to allow gas to escape from the system 2014 Northrop Grumman Systems Corporation 46 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance 16 Secure the reser
42. iodes less than 1s after a low flow condition occurs Table 3 3 Avoid with Chillers Avoid with Chillers De ionized water Iron or aluminum parts in plumbing loop Operation below air condensation temperature 1 The Patara IR TEMo laser has exposed bare copper inside the coolant loop For this reason NG CEO does not recommend using untreated de ionized DI water If DI water is used as the coolant it is important to maintain the water resistivity between 300 and 700 K ohms and to keep the water slightly basic i e keep the water above 8 0 pH The Patara IR TEMo laser is environmentally sealed but not hermetically sealed Atmospheric conditions near the exterior of the laser will mimic conditions inside laser head 2014 Northrop Grumman Systems Corporation 16 Patara IR TEMoo Laser User Manual Chapter 3 System Details Operating the Chiller WARNING Do not operate laser without cooling Inadequate heat dissipation will seriously damage the laser diodes and will void warranty If you notice coolant in the immediate vicinity of the laser shut the laser system down immediately Check to see if the coolant is coming from the laser head If so return the laser for repair If not repair the source of the leak and allow the unit to dry thoroughly before resuming operation The laser system has a coolant loop to prevent thermal damage to the laser diodes The diodes should be kept at approximately 20 C
43. iological growth or corrosion If the laser system is to be shut down for more than 24 hours the chiller should either left running or drained and the coolant loop purged with oil free dry filtered air or N2 per the Prepare for Shipment section of this manual NOTE Dirty coolant will contaminate the Nd YAG rod which will impact the laser performance 2014 Northrop Grumman Systems Corporation 45 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance Chemicals and Supplies Needed 3 Hydrogen Peroxide solution sufficient to fill the system Optishield Plus and distilled water solution 10 Optishield Plus 90 distilled water Distilled water sufficient to fill the system Two replacement particle filters NG CEO part 37023165 Cleaning Procedure 1 Drain chiller and clean any residue or contamination in the reservoir with the use of a bottle brush or alcohol wipes Using a filter housing wrench dismantle the particle filter housing Empty the coolant trapped in the filter housing into a container for later disposal Dispose of the expired particle filter and clean any residue or contamination from the inside of the filter housing Install a new filter in the housing Refill with distilled water and circulate for 5 minutes 5 Drain system completely as detailed in steps 1 and 2 Fill the chiller with a 3 solution of Hydrogen Peroxide Care should be taken to ensure that the mixture completely f
44. iption The Patara IR TEM p laser consists of three interconnected subsystems The optics subsystem contains the laser oscillator the eDrive electronic subsystem provides power and control for the laser transmitter and the chiller provides thermal control The user must supply prime power and cooling to the optics subsystem The interface relationships among these subsystems are illustrated in Figure 1 1 Chiller iiin Stablized 0 1 C Laser 15 iii _ AC Input Q Switch Control Diodes RF Signal Signal Array Power RS232 Trigger Electronics Host System 4 U eDrive AC Input Figure 1 1 Typical System Block Diagram 2014 Northrop Grumman Systems Corporation 3 Patara IR TEMoo Laser User Manual Specifications Chapter 1 Introduction Table 1 1 Typical Performance of a Standard Patara IR TEMoo Laser Parameter Units Laser Model PA 020 QTIP Laser Type DPSS Nd YAG Wavelength 1064 nm Repetition Rate 5 to 30 kHz Output Power 10 kHz 20 W Spatial Mode TEM oo Beam Diameter 10 kHz 0 9mm Beam Quality M2 10 kHz 1 3 Beam Divergence FWHM 10 kHz 2 5 mrad Pulse Width FWHM 10 kHz lt 100 ns Pulse to Pulse Stability 10 kHz lt 1 5 rms Output Stability Over 8 hours 10 kHz lt 3 rms 2014 Northrop Grumman Systems Corporation 4 Patara IR TEMoo Laser User Manual Chapter 1 Introduction Table 1 2 Other Specifications Table Parameter Performance
45. n panel Avoid voltage drops by using a properly grounded power outlet wired with 14 gauge or larger diameter wire The use of an extension cord is not recommended NOTE The chiller may be located at a level below that of the equipment being cooled As long as the process remains closed overflow will not occur when adding cooling fluid to the chiller reservoir Oxygen Depletion Risk In the event of a refrigerant leak refrigerant gas may displace oxygen that could result in suffocation and death Never place the chiller in a room that is smaller than the minimum room volume requirement as defined below If the room is ventilated the air distribution system must be analyzed to determine the worst case distribution of leaked refrigerant A leak detector alarm device is always required in a ventilated room that does not meet the minimum room volume given below Assure adequate and sufficient room volume and ventilation before placing a chiller that contains refrigerant in a room Contact Polyscience at 800 229 7569 if you have any concerns or questions Pounds of refrigerant charge can be read directly from the nameplate on your chiller Remember to include in your calculation any refrigerant that may be stored in any other containers Minimum Room Volume Pounds of refrigerant x 110 cubic feet Example Two chillers are placed in a room each containing 6 pounds of refrigerant The minimum room volume shall be 12 x 110 cubic feet or
46. ncy of trigger pulses Laser is misaligned Perform the laser power optimization procedures as described in the Optimize Laser Performance section in Chapter 5 Maintenance to bring the power back Internal optical damage to the laser contaminated rod or aging diodes If the laser power cannot be restored after optimization contact NG CEO for service No Output Power Verify the operating current is set at the operation point Verify the Q switch is set to hold off and the laser is triggered at preset PRF with an internal or external triggering source Verify the shutter light on the front panel of the eDrive is turned on indicating that laser shutter is open Verify there are no interlock warning messages on the eDrive and that the eDrive is supplying the correct current Verify the eDrive is not gated off externally and not commanded to low or 0 percent QSW power Laser Flicker When the external perturbations are applied to the laser system the laser exhibits flickering Verify the laser performance is optimized Verify there is no strong vibration forces applied to the laser head Verify that the flow rate to the laser head is above 1 5 GPM and the coolant flow is not intermittent Verify the laser has good output power A laser with high modulation loss or low operating current is sensitive to perturbations Verify the operating current is stable Verify the Q switch hold off is good 201
47. nd the current set point matches the test data sheet supplied with the laser Verify that the eDrive QSW power control is at 100 percent Ensure that the Q switch is enabled Verify the Q switch is set to internal trigger and to the frequency specified on the test data sheet Verify the chiller set point temperature and flow rate are correct Operate the laser and for at least 20 minutes to reach full power and stability before making any adjustments Only after verifying these conditions should you attempt to make adjustments to the laser system Laser Output Power Low Output Power 0 01 W full Low Q switch power Check the setting of the Q switch power in the eDrive Verify that it is set to 100 percent Problem with power meter Use another power meter to verify the measurement Low operating current Check the set current and actual current A too high or low current setting will result in low power Coolant temperature not set Verify the chiller is set to provide the correct coolant flow rate and temperature to the laser head Laser is running in CW mode or problem with hold off Check the hold off of the laser ensure the Q switch is enabled and the eDrive s RF driver is functioning properly 2014 Northrop Grumman Systems Corporation 55 Patara IR TEMoo Laser User Manual Chapter 7 Troubleshooting Pulse repetition rate is not correct Check the pulse rate frequency PRF in eDrive or the freque
48. nstalled approximately 1 5 feet away from the laser In order to protect the power meter a negative lens f 100mm with AR coating at 1064nm should be installed in front of the power meter as shown in Figure If a negative lens is not available the power meter should be at least 2m away from the laser so that the beam size is larger and the power density is below the damage threshold of the power meter Figure 4 2 Basic setup for the laser power test 2014 Northrop Grumman Systems Corporation 25 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation eDrive Setup Input Power Mounting Clearance Use only power cords suitable for your driver Use a power source that delivers voltage in the range of 100 VAC RMS to 240 VAC RMS and 47 Hz to 63 Hz Power switching is performed automatically 1 e there are no configuration switches to set for high or low voltage ranging Table 4 1 provides recommended fuse selection for each voltage range Table 4 1 Recommended Fuse Ratings F Fuse Ratings requenc AC Input q y F1 F2 120V 10 15A 50 60 Hz T 15A 250V 240V 10 8A 50 60 Hz T 8A 250V Fuse Dimensions 0 25 x 1 25 inches The front panel of the eDrive is designed with four holes to mount into an EIA 310D compliant rack If this option is used the eDrive s weight requires you use extra side supports If the eDrive is to be used on a desktop or table top it is recommended that the
49. nvolves combining mirror mount adjustments e Reduce current by 1A while making coarse adjustments Return current to normal when making fine adjustments e Make a horizontal adjustment to the HR mount Recover the laser power by making a similar adjustment to the horizontal control of the OC mount 2014 Northrop Grumman Systems Corporation 50 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance e Continue if improvement is noted If there is no improvement try the opposite direction e Perform the same procedure with the vertical adjustments of the HR and OC mount e Periodically check for hold off when making these adjustments see Check Hold Off section in this chapter e If laser power is within 5 percent of nominal typical power meter accuracy and it has good beam shape and stability stop and replace the access screws in the cover 2014 Northrop Grumman Systems Corporation 51 Patara IR TEMoo Laser User Manual Chapter 6 Service At Northrop Grumman Cutting Edge Optronics we are proud of the durability of our products Our manufacturing and quality control processes emphasize consistency ruggedness and high performance Nevertheless even the finest instruments break down occasionally We believe that the reliability record of our instruments compares favorably with that of our competition and we hope to demonstrate our superior service by providing dependable instruments and if the need arises service
50. o ___ ___O ___ O RKRARASMMERDAE MARY Ye BREE S T 11363 2006 REMRRBRAE X ARANGSAGOMED CMR RHP YS MM Ul S T 11563 2006 REMHREDK lo lo x lo lo lo x lo x x lo x lo lolololo x 2014 Northrop Grumman Systems Corporation iV Patara IR TEMoo Laser User Manual Conventions The following conventions appear in this manual This icon denotes a caution or a warning which advise you of precautions to take to avoid injury data loss or a system crash Initial Capped The first letter in uppercase refers to menu options e g Phase Delay Pulse Width CAPS Front panel buttons knobs and connectors appear in all uppercase letters e g MENU CURRENT gt The gt symbol separates a sequence of button pushes e g MENU gt CHANNEL SETUP gt PULSE WIDTH means that you push the MENU button then push the CHANNEL SETUP soft key and then push the PULSE WIDTH soft key italic Italic text denotes references to other resources that may be helpful to you or to bring attention to important information This icon denotes a note which alerts you to important information l Power Switch Position Symbols O I 0n O Off The following conventions may appear on the product DANGER An injury hazard immediately accessible as you read the marking WARNING A hazard not immediately accessible as you read the marking CAUTION A hazard to property including the product ESD Handle Appropri
51. odes age In order to match the diode wavelength to the absorption wavelength of Nd YAG crystal the chiller temperature has to be adjusted Chiller temperature adjustment should be stopped when the temperature may cause the condensation inside the laser 4 Peak the laser power by increasing the current Figure 5 4 illustrates an example of the dependence of the output power of the Patara IR TEM p laser to operating current Notice that the laser power increases as the operating current is increased The laser had maximum power around 24 5 A The laser had slope efficiency of 4 W A around the operating current The power will change 4W by changing the current 0 1 A increments The laser diodes have an aging rate less than 2 over 1 000 hours which means the laser would be considered normal if the power is maintained over 250 hours by increasing the operating current 0 1A The laser has an unstable zone where the laser doesn t have stable output power due the cavity design and variable YAG thermal lensing Therefore it is suggested to use Q switch power or use an external power attenuator to have desirable stable output power The slight difference between the actual operating current and the ATP test report value may be due to the performance difference of the chillers An increase in the operating current or a change in chiller temperature can compensate for the aging of the Patara IR TEMoo s laser diodes In order to protect the laser th
52. on 3 Diode Power Connection Connect the female connector of the diode power cable to the J2 connector on the laser head Figure 4 8 Diode Power Connection 4 RF Connection Connect the Q switch RF cables to the BNC connectors on the laser head accordingly The connector should be locked as well by turning it clockwise until it stops 2014 Northrop Grumman Systems Corporation 31 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation Figure 4 9 RF Connection Connections on eDrive 1 Laser Signal Connection Connect the male connector of laser signal cable to the receptacle labeled LASER INTERFACE on the back of eDrive Figure 4 10 Laser Signal Cable 2 Diode Power Connection Connect the male connector of the diodes power cable to the receptacle labeled ARRAY POWER on the back of the eDrive Figure 4 11 Diode Power Cable 2014 Northrop Grumman Systems Corporation 32 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation 3 RF Signal Connection Connect the QS RF cables to the RF OUT 1 connectors as shown below Figure 4 12 R 4 Chiller Interlock Connection Connect the 9 pin chiller interlock shorting connector as shown below CHILLER CAN BUS Figure 4 13 Chiller Interlock Connector 5 White Interlock Connection Connect the 2 pin white interlock shorting connector as shown below Figure 4 14 White Interlock Connectors 2014 Northrop Grumman Syst
53. pacity 1 Heat capacity should be greater than the laser s power consumption Minimum Flow Rate PA 020 QTIP 1 5 GPM 5 7 LPM 2014 Northrop Grumman Systems Corporation 15 Patara IR TEMoo Laser User Manual Chapter 3 System Details Table 3 2 Cooling System Requirements Chiller and Cooling System Requirements Capable of recommended flow rate at 60 psi Optishield Plus mixed with distilled water 90 distilled water 10 Optishield Plus Filter connected between chiller and inlet on laser Chiller Heat Capacity gt Laser Power Consumption Flow sensor installed internally on Patara lasers Replace coolant and filter monthly 1 Itis acceptable if your chiller can achieve the required minimum flow rate through the laser with a lower pressure typically around 50 psi Do not operate the chiller above 70 psi Clean coolant keeps coolant lines from clogging Untreated tap water may cause damage Suitable coolants include Optishield Plus from Opti Temp Inc Traverse City Mich 231 946 2931 If Optishield Plus is not allowed due to local regulations use Optishield 3 The filter should be capable of removing particles 5 um or larger The filter and coolant should be replaced each month or more frequently if the pH drops below 8 or the filter or coolant show any discoloration When not using NG CEO drive electronics verify that flow sensor interrupts current to d
54. pter J Part 1040 10 and 1040 11 as applicable To maintain compliance with these regulations once a year or whenever the product has been subject to adverse environmental conditions e g fire flood mechanical shock spilled solvent verify that the radiation controls such as shutter laser on light and audible warning are functioning properly All warning labels should remain fully attached see Figure 2 1 2014 Northrop Grumman Systems Corporation 9 Patara IR TEMoo Laser User Manual Chapter 2 Laser Safety Defeatably Interlocked Protective Housing DANGER Laser radiation when open and interlock defeated AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION Cutting Edge Optronics inc 20 Point West Blvd St Charles MO 63301 Manufactured Model No Serial No This Laser product complies with 21 DANGER CFR 1040 as applicable Non Interlocked Protective Housing DANGER Laser radiation when open AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION Made in the USA Warranty Void Right Hand Output Hand Output optional Figure 2 1 Example of Radiation Control Drawing 2014 Northrop Grumman Systems Corporation 10 Patara IR TEMoo Laser User Manual Chapter 2 Laser Safety Radiation Emission Label Cutting Edge Optronics Inc 20 Point West Blvd St Charles MO 63301 Manufactured Model No Serial No Pe 2 o Certification and Identification Label This Laser product complies with 2
55. r Signal Cable 32 Figure 4 11 Diode Power Cable 32 Figure 4 12 RF Signal Cables 33 Figure 4 13 Chiller Interlock Connector 33 Figure 4 14 White Interlock Connectors 33 Figure 4 15 BNC Interlock Connection 34 Table 4 2 eDrive settings 36 Figure 5 1 40 Gram Desiccant Cartridge Top 44 Figure 5 2 40 Gram Desiccant Cartridge Bottom 44 Figure 5 3 50 Gram Refill and Refill Tool 45 Figure 5 4 Example of Laser Performance Dependence on the Operating Current 49 Figure 5 5 Accessible Holes for HR and OC Mirror Adjustment 50 2014 Northrop Grumman Systems Corporation xii Patara IR TEMoo Laser User Manual Chapter 1 Introduction This introduction provides the following information Theory of operation System description Specifications 2014 Northrop Grumman Systems Corporation 1 Patara IR TEMoo Laser User Manual Chapter 1 Introduction Theory of Operation Patara Laser PA 020 QTIP is a Q switched fundamental transverse mode infrared laser The output consists of pulses of light at 1064 nm wavelength and less than 100 nanosecond pulse duration at repetition frequencies of 10 kHz It is a TEMoo laser and therefore has very high brightness The CW pumped Nd YAG rod module in the oscillator is optically excited using arrays of laser diode bars operating at wavelengths in the neighborhood of 806 nm A laser oscillator consists of an optical amplifier in an optical cavity which serves to form a laser optical mode which can oscillate wh
56. r User Manual Table of Contents Table of Contents Chapter 1 Introduction Theory of Operation System Description Specifications Chapter 2 Laser Safety Safety Overview Precautions for Safe Operation Center for Devices and Radiological Health Compliance Chapter 3 System Details Patara IR TEMoo Laser Closed Loop Chiller eDrive Nitro Chapter 4 Installation and Operation Laser System Components Unpacking the Laser System Laser Head Setup eDrive Setup Chiller Setup Connecting the Chiller PolyScience 6000 Series Power Up Procedure First Time Laser Power Up Procedure Daily Operation Adjusting the Laser System 2014 Northrop Grumman Systems Corporation iX 20 22 23 23 25 26 21 29 34 35 37 39 Patara IR TEMoo Laser User Manual External Triggering and FPS Chapter 5 Maintenance Prepare for Shipment Purge Housing Replace Desiccant Cartridge Clean and Maintain Chiller Check Hold Off Extend Lifetime of Laser Diodes Optimize Laser Performance Chapter 6 Service Contacting Customer Service Laser Module Replacement Return the Instrument for Repair Chapter 7 Troubleshooting Initial Checklist Laser Output Power eDrive Operation Appendix A Customer Service Questions Appendix B System International Units Appendix C Acronyms Index 2014 Northrop Grumman Systems Corporation Table of Contents 40 41 42 42 43 45 47 47 47 52 53 53 53 54 55
57. ser User Manual Chapter 1 Introduction Thermal Control Subsystem Thermal control and heat removal from the Laser Transmitter is accomplished by a chiller provided by CEO or the user The laser has an integral flow switch which will interrupt drive current to the amplifier module and power to the Q switch should the flow rate fall below 1 GPM 3 8 LPM Flow direction is labeled on the laser optics housing below the coupler ports Please observe the flow direction at all times The thermal control system must be capable of maintaining the temperature set point to 0 1 C with a flow rate of 1 5 GPM 5 7 LPM This will require a pressure of approximately 50 psi at the input to the laser housing in order to achieve the flow rate Pressures at the chiller may be several psi higher if additional filtering flow metering fittings and long runs of coolant tubing are used Coolant used in the system must be compatible with the materials used in the internal coolant lines of the laser Tap or de ionized water must be avoided because of corrosion and mineral deposits NG CEO can supply an approved coolant for this application 2014 Northrop Grumman Systems Corporation 6 Patara IR TEMoo Laser User Manual Chapter 2 Laser Safety Please read this chapter carefully before installing or operating your laser An NG CEO trained service engineer should perform all service and repair operations If you plan to service your laser please follow the
58. ser beam or at specular reflection even with protective eye wear on Wear laser safety eyewear that is optically dense at the wavelengths of operation 798 816 nm pump light 1064 nm Provide a controlled access area for laser operation and limit access to those trained in laser safety principles Post warning signs in prominent locations near the laser operation area Use safety interlocks on all entryways All NG CEO system control electronics are supplied with interlock inputs that can be used to preclude operation with an open safety door Enclose beam paths wherever possible Set up experiments so the laser beam is below eye level Work in an area that is well lighted to avoid dilation of pupils Set up a target for the beam Set up shields to prevent reflected beams from escaping the laser operation area 2014 Northrop Grumman Systems Corporation 8 Patara IR TEMoo Laser User Manual Chapter 2 Laser Safety View an infrared laser beam with a protected image converter at an oblique angle reflecting from a diffuse surface Ensure that all electrical connections are made in a safe manner Position equipment so that electrical connections are shielded from accidental touch Do not smoke eat or drink in laser areas Avoid leaving an operating laser unattended Center for Devices and Radiological Health Compliance This laser product complies with Title 21 of the U S Code of Federal Regulations Chapter 1 Subcha
59. ss holes should be always covered unless an alignment is being performed Any dust invasion through these holes can cause damage to the mirrors and crystals inside the laser All the holes on the laser enclosure should be sealed all times to prevent moisture penetration Moisture in the enclosure can degrade the coatings on all optical components ACCESS HOLES FOR OC MIRROR ADJUSTMENT 6 5 a 8 E o NE CLOCKWISE MOVE BEAM TO RIGHT COUNTER CLOCKWISE MOVE BEAM TO LEFT y LASER OUT m o CLOCKWISE MOVE BEAM DOWN COUNTER CLOCKWISE MOVE BEAM UP CLOCKWISE MOVE BEAM DOWN COUNTER CLOCKWISE MOVE BEAM UP CLOCKWISE MOVE BEAM TO RIGHT COUNTER CLOCKWISE MOVE BEAM TO LEFT ACCESS HOLES FOR HR MIRROR ADJUSTMENT Figure 3 3 Patara IR TEMoo Top View 2014 Northrop Grumman Systems Corporation 14 Patara IR TEMoo Laser User Manual Chapter 3 System Details Closed Loop Chiller The single most common cause of a laser returned for repair involves customer damage More than one third of these damaged lasers result from cooling problems Coolant problems almost always require the replacement of the diode arrays the single most expensive component in NG CEO lasers This section describes how to avoid damaging arrays WARNING Do not operate laser without cooling Inadequate heat dissipation will seriously damage the laser diodes and will void warranty Table 3 1 Heat Capacity and Minimum Flow Rate Heat Ca
60. st Boulevard Saint Charles MO 63301 USA Phone 636 916 4900 Fax 636 916 4994 Email ngceoservice ngc com 2014 Northrop Grumman Systems Corporation 61 Patara IR TEMoo Laser User Manual Appendix B System International Units The following System International SI units abbreviations and prefixes are used throughout NG CEO user manuals Quantity Unit Symbol Abbrv Prefixes mass gram g tera 10 T length meter m giga 10 G time second s mega 10 M frequency Hertz Hz kilo 1 0 k force Newton N deci 10 d energy Joule J centi 1 0 c power Watt Ww milli 10 m electric current Ampere A micro 1 0 u electric charge Coulomb C nano 10 n electric potential Volt V pico 10t p resistance ohm Q femto 10 f inductance Henry H atto 10 a magnetic flux Weber Wb magnetic flux Tesla T density luminous intensity candela cd temperature Kelvin K 2014 Northrop Grumman Systems Corporation 62 Patara IR TEMoo Laser User Manual Appendix C Acronyms Acronym ACGIH ANSI AO AR ATP ASM CDRH CEO CFR CW DC EO ESD FET FWHM FPS GaAlAs GPM HeNe HM HR IEC 2014 Northrop Grumman Systems Corporation Description American Conference of Government Industrial Hygienists American National Standards Institute Acousto optic Anti Reflective Acceptance Test Procedure Array Sub Module Center for De
61. ting on the report 3 The flow rate for Patara IR TEMo laser is 1 5 GPM Ensure the flow rate meets the requirement If it does not open the valve inside the chiller until it matches the flow rate recorded in the ATP test report data summary When adjusting and setting the flow rate do not allow the coolant pressure to exceed 70 psi NOTE Chiller flow rate calibration may be required Please refer to the chiller user manual for instructions on calibration 4 Run the chiller for approximately 1 2 hour to allow the coolant temperature to stabilize at the set point Turn on and check the eDrive settings WARNING Read the eDrive user s manual to be familiar with safety precautions functions and settings 1 Flip the power switch on the back panel of the eDrive to the ON or position 2 Make sure that the red EMERGENCY button is released Turn on the eDrive by turning the key to ON position and pressing the POWER button to power up the eDrive 3 Check all other laser parameters in the eDrive Nitro The menu designations will help locate the settings Use the following values for the Patara IR TEMoo laser 2014 Northrop Grumman Systems Corporation 35 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation Table 4 2 eDrive settings Channel Setup Channel Setup Channel Setup Channel Setup Channel Setup Interface Setup Interface Setup Interface Setup 4 Verify that there are no objects
62. to 35 C See the ATP test report data summary included with your laser for optimum temperature and flow rate settings Operating the laser diodes for even a short period of time even second without coolant will cause permanent damage To help prevent this all NG CEO drive electronics are equipped with a coolant interlock This interlock interrupts drive current to the diodes when coolant flow rate drops below a set point When setting up the laser system for the first time NG CEO recommends testing the flow interlock before firing Turn the eDrive on without current applied to the laser and then turn the chiller off A coolant interlock fault should appear on the screen By testing the interlock with no current to the laser there is no risk of damaging the laser NOTE The chiller must run continuously to prevent biological growth or corrosion If the laser system is to be shut down for more than 1 week the laser system should be drained and the coolant loop purged with oil free dry filtered air or N2 per the Prepare for Shipment section of this manual WARNING Do not operate the coolant system below air condensation temperature dew point at the laser head Condensation on the diode arrays can seriously damage the laser head and will void the warranty Consult NG CEO technical service if you have any questions Air Condensation Temperature The air condensation temperature or dew point is the highest surface temp
63. ure which may take 5 to 10 minutes 2 Turn the eDrive power enable key switch to the ON position Press the eDrive POWER switch LCD panel illuminates 4 Press MENU to verify the current and Q switch settings NOTE Make sure the eDrive trigger signals are properly set if the laser uses external triggering r 5 Check and set the operational current 2014 Northrop Grumman Systems Corporation 37 Patara IR TEMoo Laser User Manual 6 Chapter 4 Installation and Operation Press EMISSION to fire the laser diode The EMISSION and LASER ON indicators will begin to blink Press the SHUTTER button The EMISSION and LASER ON indicators will become steady The laser will automatically ramp the current to the set point with the preset slew rate Wait for about 20 minutes to reach 95 percent of nominal output power Manual Interrupt Procedure 1 Press SHUTTER button on the eDrive front panel The button will blink indicating the shutter is closed and the current is reduced to the standby current level Resume operation by pressing SHUTTER again The laser will resume operation with no audible warning and the button will be illuminated NOTE The laser diodes are operated at set standby current while the shutter is closed Interlock Interrupt There is an interlock connector white at back panel of eDrive If the continuity of the interlock is broken the laser will stop lasing by closing the shutter and decreasing the curr
64. vices and Radiological Health Cutting Edge Optronics Incorporated Code of Federal Regulations Continuous Wave Direct Current Electro Optical type of Q switch Electro Static Discharge First Pulse Suppression Full Width Half Max First Pulse Suppression Gallium Aluminum Arsenide Gallon Per Minute Helium Neon Harmonic Mirror High Reflection International Electrotechnical Commission 63 Patara IR TEMoo Laser User Manual Acronym KTP LPM LBO MCC N2 Nd YAG Nd YLF NG NIR OC OSHA PRF PSI QCW QSW RF RH RMS SHG TEC TEMoo TTL UV VAC 2014 Northrop Grumman Systems Corporation Appendix C Acronyms Description Infared Potassium Titanyl Phosphate Liters Per Minute Lithium Triborate Meters Concave Nitrogen Neodymium Doped Yitrium Aluminum Garnet Neodymium doped Yttrium Lithium Fluoride Northrop Grumman Near Infared Output Coupler Occupational Safety and Health Administration Pulse Rate Frequency Pounds per Square Inch Quasi Continuous Wave Q switch Radio Frequency Relative Humidity Root Mean Square Second Harmonic Generator Thermal Electric Cooler Transverse Electromagnetic Mode Transistor Transistor Logic Ultraviolet Volts Alternating Current 64 Patara IR TEMoo Laser User Manual Index A ATP See test report BNC 38 45 C caution vi chassis ground vi chiller 3 4 10 13 14 15 16 20 21 25 26 27 28 32 33 35 36 39
65. voir cap 17 The chiller is now ready to use Check Hold Off Checking hold off is a technique needed to verify proper operation of the laser To check hold off perform the following steps 1 Turn on the laser and run for at least 20 minutes 2 Lower the current to 10 A Set the Q switch QSW internal trigger or external gate mode to external trigger mode in the Channel Menu on the eDrive Ensure there is no input to the external gate BNC on the rear panel of the eDrive Refer to the Pulsed Q Switch Setup Menu in the Standard Menus section of the eDrive user s manual 4 Gradually increase the current to the full operation current level 5 Observe the beam output on the power meter Hold off condition is met when no green light is visible 6 If green is observed the laser does not hold off and may need internal repair 7 Reduce the current to 10 A 8 Return the eDrive to internal trigger or external gate mode 9 Gradually increase the current to the operation current Extend Lifetime of Laser Diodes The specification for laser system optical output is provided in the ATP Test Report Data Summary delivered with the system During its early lifetime the laser diodes will deliver this specified power at or below the preset current limit As the diodes age an increase in current may be required to maintain power and beam quality so the diodes can continue to be used Once the maximum current of 30 A is reached
66. ycle The amplitude of the giant pulse is dependent on the non lasing duration as well as the operating current Figure 4 27 First Giant Pulse with FPS Disabled CAUTION The FPS has to be enabled and parameters for FPS have to be set properly Failure to suppress the first giant pulse may cause the internal optical damage as well as damage to the work piece For each type of laser processing a particular operating current and pulse repetition rate are needed The giant pulse can be suppressed by enabling FPS and setting the proper FPS parameters For detailed information please refer the Configuring the Integrated AO Q Switch RF Driver section in Chapter 3 Operating Basics in the eDrive User Manual To set the FPS properly use a photodiode detect with response time 1 ns and an oscilloscope 2014 Northrop Grumman Systems Corporation 40 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance The chapter contains information in these sections Prepare for shipment Purge housing Replace desiccant cartridge Clean and Maintain chiller Check hold off Extend lifetime of laser diodes Optimize laser performance 2014 Northrop Grumman Systems Corporation 41 Patara IR TEMoo Laser User Manual Chapter 5 Maintenance Prepare for Shipment It is anticipated that in OEM applications the Patara IR TEMo laser will be installed in another system that will be shipped internationally The Patara IR TEMoo optical
67. you discover any damage immediately file a claim against the carrier and 2014 Northrop Grumman Systems Corporation 23 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation notify NG CEO technical service NG CEO will arrange for repair without waiting for settlement of your claim Keep the shipping container If you file a damage claim you may need it to demonstrate that the damage occurred as a result of shipping If you need to return the unit for service the specially designed carton assures adequate protection A standard Patara IR TEM p laser system consists of PA 020 QTIP PA 020 QTIP Laser Head eDrive P N ED4C AXA 2440N 120V Single Phase 60 Hz Chiller P N 6362T31CE20C OR 208 230V Single Phase 50 60 Hz Chiller P N 6352T41CE30E Laser Signal Cable RF Cables Hoses and Filter for Chiller Power Cord for Chiller Power Cord for eDrive Desiccant Cartridge Please check the contents against the packing list and the sales order 2014 Northrop Grumman Systems Corporation 24 Patara IR TEMoo Laser User Manual Chapter 4 Installation and Operation Laser Head Setup The laser head should be mounted on an optical table or equivalent strong flat surface There are three mounting holes provided to secure the laser The laser should be installed in a clean environment In the direction of the laser output beam a power meter with the power scale up to 30W should be i

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