OMH-6745B Fiber Optic Power/Wavehead Manual
Contents
1. 15 Error Messages 16 Programming Examples sssi res 16 Chapter4 Calibration Calibration Overview 19 Recommended Equipment 19 Warm Up i aka Wa A va wk kana added 19 Manual Operation User Calibration 20 Remote GPIB Operation User Calibration 20 Programming a Fixed Offset to Wavelength and Power Measurements 21 Resetting the User Calibration 21 il El d ji OMH 6745B ILA Lightwave Chapter5 Troubleshooting Introduction 23 Troubleshooting Guide 23 10_04 OMH 6745B iii TT pee ens iv OMH 6745B Lightwave LIST OF FIGURES Figure 2 1 OMM 6810B Front Panel 8 Figure 2 2 Rear Panel Input 9 Figure 2 3 Power Analog Out 10 Figure 2 4 Wavelength Setting 11 Figure 3 1 Command Path Structure 18 10_04 OMH 6745B vi OMH 6745B Lightwave SAFETY AND WARRANTY INFORMATION The Safety and Warranty Information section provides details about cautionary symbols used in the manual safety markings used on the instrum2. User Calibration Mode When the LED above the CAL USER button is lighted the unit employs the user defined calibration USER which has been stored in the Optical Measurement Head Pressing the CAL USER button when the CAL USER LED is lit causes the instrument to revert to factory calibration and the LED to out Pressing the CAL button while the LED L J above the CAL USER button is lighted initiates the user calibration procedure Installing Different Fiber Optic Connectors All connectors used on the 6745B are simple threaded caps To change the connector simply unscrew it from the detector housing and replace it with the desired connector cap Excessive fource should not be used when tightening the connector caps to the detector mount When the 6745B is not in use the front cover cap should be in place to prevent accumulation of particles or debris within the head assembly Care and Maintenance The design of the Measurement Head is fairly robust however it should be handled with care Stress from dropping the Head or other mishandling could dislodge critical alignments within the Head effectively changing its response and nullifying its calibration It is also sensitive to electrostatic discharge When not in use replace the ESD protective cap that came with the Head on the D connector and store the Head in the ESD safe bag 12 OMH 6745B IN ILX Lightwave OPERATION Care and Ma
3. Wavelength Linearity w Power Change lt 0 5 nm Sampling Rate Slow 16 samples 60 ms sample Medium 4 samples 60 ms sample Fast 1 sample 60 ms sample Input Bandwidth Slow 1Hz Medium 10 Hz Fast 60 Hz Analog Output Specifications Analog output representing the power measurement is available at the rear panel of the multimeter Refer to the OMM 6810B Instruction Manual for details 10 04 OMH 6745B 3 4 OMH 6745B INTRODUCTION AND SPECIFICATIONS Specifications Display Left Display Power Display Units Linear Power Log Power pW nW uW mW W AP dBm dB Range Linear Power Log Power 0 000 nW to 999 999 W 99 999 to 99 999 dBm dB Resolution Slow Update Rate Linear Power 0 001 pW Log Power 0 001 dB Resolution Medium Fast Update Rate Linear Power 0 01 pW Log Power 0 01 dB Right Display Wavelength Display Units nm cm 1 AA Range 950 0 to 1650 0 nm Resolution 1 nm 1 cm Bargraph Represents the percent of full scale power within the selected gain range Brightness 5 settings incrementally spaced from dark to brightest General Specifications Operating Temperature 15 C to 35 C Storage Temperature 40 C to 70 C Humidity non condensing lt 70 RH non condensing input power lt 10 uW lt 85 RH non condensing input power gt 10 uW O
4. device dependent GPIB commands Table 3 1 on the next page outlines the subset of commands which are valid when the OMH 6745B Fiber Optic Power Wavehead is attached The command path tree structure is illustrated in Figure 3 1 Note The usage and syntax of each device dependent command is best described in Chapter 4 of the OMM 6810B Optical Multimeter Instruction Manual Lightwave OMH 6745B 15 9 3 COMMAND REFERENCE mu 0 Error Messages Error Messages Error messages may appear on the right display In remote operation the current error list can be read by issuing the ERR query When this is done a string is returned containing the previously unread error messages up to ten When the error queue is active bit 7 of the Status Byte is also set to one Appendix A of the OMM 6810B Instruction Manual contains an explanation of the error messages which may be reported by the 6810B on the display or via remote operation Programming Examples 16 B OMH 6745B Examples of programming the 6810B via GPIB are shown in the 6810B Instruction Manual Chapter 4 Command Name Parameters Description Expected BRIght 1 Sets the brightness of the front panel BRIght None Returns the level of the display brightness CAL POWERSET 2 Sets the user calibration power CAL RECall None Resets the user calibration CAL USER None Starts the user ca
5. ix for more information Lightwave OMH 6745B 8 vii koy SAFETY SYMBOLS This section describes the safety symbols and classifications Technical specifications including electrical ratings and weight are included within the manual See the Table of Contents to locate the specifications and other product information The following classifications are standard across all ILX Lightwave products Indoor use only Ordinary Protection This product is NOT protected against the harmful ingress of moisture Class Equipment grounded type Mains supply voltage fluctuations are not to exceed 10 of the nominal supply voltage Pollution Degree II Installation overvoltage Category II for transient overvoltages Maximum Relative Humidity lt 80 RH non condensing Operating temperature range of 0 C to 40 C Storage and transportation temperature of 40 C to 70 C Maximum altitude 3000 m 9843 ft This equipment is suitable for continuous operation Safety Marking Symbols This section provides a description of the safety marking symbols that appear on the instrument These symbols provide information about potentially dangerous situations which can result in death injury or damage to the instrument and other components Caution Earth refer to ground manual Terminal Alternating Visible and or current invisible laser radiation Caution risk Protecti
6. 0B is performing real time power measurements Programming a Fixed Offset to Wavelength and Power Measurements Rather than performing a User Calibration it is possible to enter offset values which are applied to future wavelength and power measurements For more information refer to the POWER OFFSET and WAVE OFFSET GPIB commands in Chapter 4 of the OMM 6810B Instruction Manual Resetting the User Calibration The User Calibration is preset at the factory The factory preset calibration can be restored by pressing the CAL USER button so that the CAL USER indicator is off or by sending the GPIB command CAL USER OFF 10 04 OMH 6745B m 21 CALIBRATION Resetting the User Calibration 22 OMH 6745B BILA Lightwave CHAPTER TROUBLESHOOTING El a E El w a E El m Li E H E m Introduction This chapter is intended to be used as a guide when the OMM 6810B and OMH 6745B do not perform as expected It is not a service manual rather a guide to alleviate basic problems which may arise during operation A more complete guide including a GPIB troubleshooting guide is provided in Chapter 7 of the OMM 6810B Instruction Manual Troubleshooting Guide If you have difficulty using the 6745B refer to the symptoms listed here Common causes and corrective actions are listed here If problems persist contact your ILX Lightwave representative at 406 586 1244 Symptom Causes and Corrective Actions Measurement will not T
7. Comments Suggestions and Problems To ensure that you get the most out of your ILX Lightwave product we ask that you direct any product operation or service related questions or comments to ILX Lightwave Customer Support You may contact us in whatever way is most convenient PHONG med Ra bu eee 800 459 9459 or 406 586 1244 AI EE 406 586 9405 Onithe web at meee a pu mens ilx custhelp com Or mail to ILX Lightwave Corporation P O Box 6310 Bozeman Montana U S A 59771 www ilxlightwave com When you contact us please have the following information Model Number Serial Number End user Name Company Phone Fax Description of what is connected to the ILX Lightwave instrument Description of the problem If ILX Lightwave determines that a return to the factory is necessary you are issued a Return Authorization RA number Please mark this number on the outside of the shipping box You or your shipping service are responsible for any shipping damage when returning the instrument to ILX Lightwave ILX recommends you insure the shipment If the original shipping container is not available place your instrument 10 04 OMH 6745B 8 xi TT in a container with at least 3 inches 7 5 cm of compressible packaging material on all sides We look forward to serving you even better in the future xii 6745 Lightwave CHA
8. ECURE PSC TERM PSC TERM PUD TIME PUD TIMER RST TRIGGER SRE TRIGGER SRE STB WAVE TST ZERO WAI ZERO 18 OMH 6745B root AN li I PRESELECT RANGE COND ole la CHAN AUTO AUTO AUTO CHAN AUTO AUTO MODE SAVE MODE MODE MODE OFFSET OFFSET OFFSET OFFSET REF REF REF REF Figure 3 1 Command Path Structure Lightwave CHAPTER CALIBRATION El This chapter describes how to calibrate the OMH 6745B Fiber Optic Power Wavehead The OMH 6745B Fiber Optic Power Wavehead has been sealed to protect internal components from damage and to maintain the factory calibration Do not attempt to disassemble the head Calibration Overview It is possible to calibrate the OMH 6745B using a source of known power and wavelength Calibrate the 6745B whenever performance verification indicates that calibration is necessary The wavelength calibration consists of one point which shifts future measurements by the amount of the calibration The power calibration consists of one point which changes future power measurements by the percentage calculated during the calibration Recommended Equipment It is recommended that gas line sources or spectral lamps with the proper line isolation filters be used for calibration Laser diodes are not recommended however an extremely stable laser diode may be used if it is lasing in a single mode and the wavelength is first measu
9. ILA Lightwave CHAPTER 2 OPERATION El El El w El El E a El El m a This chapter describes how to install and operate the OMH 6745B Fiber Optic Power WaveHead in conjunction with a OMM 6810B Optical Multimeter It is divided into sections covering installation power up front panel and rear panel controls and general operation A detailed familiarization of the main unit features are presented in Chapter 2 of the OMM 6810B Instruction Manual Installation The OMH 6745B must be connected to the OMM 6810B Make sure the power to the Multimeter is turned off then connect the cable from the 6745B to the INPUT connector on the rear panel of the multimeter warninG Do not attach or remove the power head while power is applied to the Multimeter Please turn the power switch off when changing heads warnine To avoid electrical shock hazard connect the meter to a properly earth grounded three prong receptacle only Failure to observe this precaution can result in severe injury or death Lightwave OMH 6745B 7 8 j OPERATION Power Up Power Up Connect the main unit to an AC power source Press the POWER switch to supply power to the device and start the power up sequence The power up sequence takes about six seconds Initially all LEDs and enunciators are illuminated and the seven segment displays denote 8 Then all LEDs and the displays are turned off while the microprocessor executes a d
10. PTER 1 INTRODUCTION AND SPECIFICATIONS a a ll El EI Bi Ei El 2 El E El L This manual contains operation and maintenance information for the OMH 6745B Fiber Optic Power Wavehead The OMH 6745B must be used in conjunction with the OMM 6810B Optical Multimeter To get started immediately read Appendix B of the OMM 6810B Instruction Manual first Product Overview The OMH 6745B Fiber Optic Power Wavehead when coupled to an OMM 6810B Optical Multimeter provides the capability to accurately measure the power and wavelength of laser sources between 950 and 1650 nm The OMH 6745B is calibrated to NIST traceable power and wavelength standards to ensure accuracy Quick setup a two meter cable and a robust design makes the OMH 6745B Fiber Optic Power Wavehead easy to integrate into any fiber optic experiment or measurement The instrument can be integrated with other equipment via the optional GPIB IEEE 488 2 interface Safety Considerations Care must be exercised when handling fiber optic cables Direct viewing of the sometimes invisible fiber optic output can produce retinal or corneal damage Absorption of the laser light by the eye causes localized heating and denaturing of tissue proteins The ANSI publication Z 136 1 The Safe Use of Laser lists Maximum Permissible Exposure MPE levels for direct or intrabeam viewing of laser beams From the MPE levels a hazard zone may be computed for a particular laser and ex
11. a special fitting to accomodate Hewlett Packard 81000 series connectors Measuring or Setting the Wavelength For automatic wavelength compensation of power measurements press the WAVELENGTH AUTO button so that the indicator above the button is lit The wavelength of the source can also be manually programmed into the 6810B using the procedure below WAVELENGTH auto I gt STORE M A2 A8 4 L Figure 2 4 Wavelength Setting Use the WAVELENGTH LEFT and RIGHT arrow buttons to select the digit on the WAVELENGTH display that will be controlled by the WAVELENGTH UP and DOWN arrow buttons The selected digit will flash Use the WAVELENGTH UP and DOWN arrow buttons to increment or decrement the selected digit If no buttons are pressed in three seconds the displayed wavelength will be locked in and the digit will stop flashing Commonly used wavelengths may be stored or retrieved by using the WAVELENGTH BLUE SHIFT STORE A A A2 A3 and A4 buttons as described in Chapter 2 of the OMM 6810B manual Zeroing The DISPLAY ZERO function is used to remove the effects that ambient light has on the power measurement It is important to zero the multimeter with the OMH 6745B attached before taking measurements This is especially true for low input power applications in cases of high ambient light intensity Pressing the DISPLAY ZERO button when the LED above the DISPLAY ZERO button is not lit starts
12. e capability of the OMH 6745B Measurements are not accurate at a known wavelength or power standard Be certain the zeroing procedure has been performed correctly as described in Chapter 2 It may be necessary to perform the User Calibration Measurement seems erratic with a pulsed source input Change update rates Best results with pulsed sources are usually in the SLOW update rate Work in MANUAL gain ranging mode The AUTORANGING algorithm may have difficulty with some pulsed sources espeically those with duty cycles less than 50 Lightwave
13. ent and information about the Warranty including Customer Service contact information Safety Information and the Manual Throughout this manual you will see the words Caution and Warning indicating potentially dangerous or hazardous situations which if not avoided could result in death serious or minor injury or damage to the product Specifically CAUTION Caution indicates a potentially hazardous situation which can result in minor or moderate injury or damage to the product or equipment AN warnine Warning indicates a potentially dangerous situation which can result in serious injury or death WARNING Visible and or invisible laser radiation Avoid direct exposure to the beam General Safety Considerations If any of the following conditions exist or are even suspected do not use the instrument until safe operation can be verified by trained service personnel Visible damage Severe transport stress Prolonged storage under adverse conditions Failure to perform intended measurements or functions If necessary return the instrument to ILX Lightwave or authorized local ILX Lightwave distributor for service or repair to ensure that safety features are maintained see the contact information on page xi All instruments returned to ILX Lightwave are required to have a Return Authorization Number assigned by an official representative of ILX Lightwave Corporation See Returning an Instrument on page
14. evice self test Should the self test fail the error message E 720 is displayed The meter then loads personality and calibration data from the measurement head The left display indicates 6745 and the firmware version is shown on the right display If an error occurs while loading data message E 711 is displayed If an incompatible head is connected E 713 is displayed If a measurement head is not connected both displays show until a head is attached At power up the main unit is configured to the same state that was present when the power was last turned off Front Panel Controls OMH 6745B The OMM 6810B OMH 6745B is intuitively operated from the front panel keypad indicator LEDs and dual displays A drawing of the front panel is shown in Figure 2 1 Front panel functions which are not available with the OMH 6745B are outlined later in this chapter Refer to the OMM 6810B Instruction Manual for descriptions of each front panel Switch function HEB 21 10 68108 OPTICAL MULTIM DISPLAY SS GER 7 LOG LIN nm cm 1 K KD N AP rrr rrr rrr GPIB POWER WAVELENGT CAL VIEW REF BRIGHT AUTO ATTN AUTO lt gt USER RATE ZOOM REMOTE STORE A1 2 idis RANGE X3 4 0 3 9 s Figure 2 1 OMM 6810B Front Panel Lightwave OPERATION Front Panel Controls Unused Functions The Multimeter function that is not utilized disabled when t
15. f full scale power within the selected gain range For example if the full scale power for gain range three is 10 uW and the displayed power is 5 000 uW then 5 0 volts is present on the POWER ANALOG OUT connector Figure 2 3 Power Analog Out General Operating Procedures The following sections present some guidelines for operating the OMM 6810B with the OMH 6745B More detailed instructions are found in the OMM 6810B Instruction Manual Remote operation is discussed in Chapter 4 Warm up and Environmental Considerations The main unit and Measurement Head should operate at an ambient temperature between 10 and 35 C and a relative humidity less than 7096 Storage temperatures should be between 40 and 70 C To achieve rated stability let both devices warm up for at least one hour Fiber Optic Cable Considerations The OMH 6745B is designed to provide a simple operating format Be certain the fiber ferrule is clean and free from debris before inserting into the input adapter Input fiber connectors should be properly seated within the input adapter and the fiber should be secured to the bench for best accuracy Fiber Optic Connector Options Several connectors are available for the 6745B Compatible connector types include FC SC ST Diamon HMS 10 NEC D4 Radiall VFO DF Radiall EC DIN 10 OMH 6745B Lightwave OPERATION General Operating Procedures 47256 4108 Biconic and bare fiber to FC ILX also offers
16. he OMH 6745B Fiber Optic Power Wavehead is attached are shown to the right If a disabled button is pushed the 6810B will display the error code E 715 ATTN All other switch functions perform as described in the OMM 6810B Instruction Manual Error Display Execution errors are indicated on the right display Errors are shown as E xxx where xxx is a three digit number representing the unique error Errors are displayed for three seconds or until the error causing condition is remedied whichever is longer See Appendix in the OMM 6810B Instruction Manual for a detailed list of error messages Rear Panel Connections The OMH 6745B interfaces with the rear panel of the multimeter as described in the following paragraphs Input Connector The OMH 6745B Fiber Optic Power Wavehead interfaces the main unit via the 26 pin high density D connector located on the lower left side of the rear panel Do not attach or remove the head while power is applied to the Optical Multimeter Please turn the power switch off when changing optical measurement heads Figure 2 2 Rear Panel Input 10 04 OMH 6745B 9 Te 2 OPERATION CHAPTER amp General Operating Procedures Analog Output Analog output representing the power measurement is located in the upper left corner of the 6810B rear panel The POWER ANALOG OUT is a non calibrated value between 0 and 10 volts representing the measured power as a percent o
17. he OMH 6745B is designed to accurately measure the stabilize wavelength of a CW source with an amplitude instability of up to 40 depth of modulation Ensure the laser source s wavelength is stable and that any modulation is minimized This condition may occur if the laser has not warmed up Most gas laser cavities expand when first turned on which can cause intensity and wavelength fluctuations Check for tight connects between the main unit and the 6745B and ensure other noisy electronic devices are not located near the head cases of low input power and or high background light try working in a dark environment and be sure to zero the instrument as described in Chapter 2 Display shows The 6745B is not connected to the Multimeter Display shows HI P This condition occurs when the laser s input power exceeds the maximum allowed for the selected gain range Measurements at this level are invalid If in manual mode press the DOWN switch to select the next lower gain range it iLX Lightwave OMH 6745B m 23 TROUBLESHOOTING Troubleshooting Guide 24 OMH 6745B Display shows HI A This condition occurs when the instrument interprets the laser s wavelength as greater than 1650 nm which is beyond the capability of the OMH 6745B Display shows LO A This condition occurs when the instrument interprets the laser s wavelength as less than 950 nm which is beyond th
18. intenance Cleaning In general avoid cleaning the interior of the Measurement Head especially by blowing into it or by using compressed air If minor dust or other particulates have entered the input aperture remove the contaminant using canned air or dry nitrogen Use short bursts while holding the head such that the aperture is directed downward 10_04 OMH 6745B 8 13 OPERATION Care and Maintenance SET 14 OMH 6745B BILA Lightwave CHAPTER 3 COMMAND REFERENCE ii E L E La El w m Li E B Ei El L m This chapter is a guide to the usage of the device dependent GPIB commands for the OMM 6810B Optical Multimeter when the OMH 6745B Fiber Optic Power Wavehead is attached This chapter is of primary interest to users who wish to utilize the GPIB option A complete reference describing the syntax and usage of each device dependent command is provided in Chapter 4 of the OMM 6810B Instruction Manual Common Commands The GPIB Common Commands which are defined by the ANSI IEEE 488 2 1987 standard are described in Chapter 3 of the 6810B Instruction Manual These commands do not necessarily reflect front panel operations and are not unique to the measurement head connected to the meter In other words the common commands listed in the 6810B Instruction Manual are all valid when using the OMH 6745B Device Dependent Commands Chapter 4 of the OMM 6810B Instruction Manual contains the complete set of
19. ired service or repair Include the instrument serial number from the rear panel of the instrument 3 Attach the anti static protective caps that were shipped with the instrument and place the instrument in a protective anti static bag 4 Place the instrument in the original packing container with at least 3 inches 7 5 cm of compressible packaging material Shipping damage is not covered by this warranty 5 Secure the packing box with fiber reinforced strapping tape or metal bands 6 Send the instrument transportation pre paid to ILX Lightwave Clearly write the return authorization number on the outside of the box and on the shipping paperwork ILX Lightwave recommends you insure the shipment If the original shipping container is not available place your instrument a container with at least 3 inches 7 5 cm of compressible packaging material on all sides Repairs are made and the instrument returned transportation pre paid Repairs are warranted for the remainder of the original warranty or for 90 days whichever is greater 10_04 OMH 6745B ix TT Claims for Shipping Damage When you receive the instrument inspect it immediately for any damage or shortages on the packing list If the instrument is damaged file a claim with the carrier The factory will supply you with a quotation for estimated costs of repair You must negotiate and settle with the carrier for the amount of damage OMH 6745B BILA Lightwave
20. l User s Guide l Fiber Optic Power Wavehead OMH 6745B Ti LX 68108 OPTICAL MULTIMETER DISPLAY LOG UN nm en se CAL VIEW REF BRIGHT OWER Es am po al poo gt USER MANGE RATE 200m Utena U SET ZERO 4 4 i LX LEG nwa ne Photonic Test 8 Measurement Instrumentation ILX Lightwave Corporation P O Box 6310 Bozeman MT U S A 59771 U S 8 Canada 1 800 459 9459 International Inquiries 406 586 1244 Fax 406 586 9405 E mail support ilxlightwave com www ilxlightwave com 70023001 RO2 10 04 TABLE OF CONTENTS E EB B El El H B Bi m m El Bi Table of Contents i List of Figures and Tables V Safety and Warranty Information vii Safety Information and the Manual vii General Safety Considerations vii Safety Symbols viii Safety Marking 5 5 viii Warranty MDC PC ix Comments Suggestions and Problems xi Chapter 1 Introduction and Specifications Product Overview 1 Safety Considerations ee eee e len n eee 1 Available Option
21. libration COND None Returns the condition status register ENAB COND 1 Sets the enable register for conditions ENAB COND None Returns the condition enable register ENAB EVENT 1 Sets the enable register for events ENAB EVENT None Returns the event enable register ERRors None Returns errors generated since last ERR EVEnt None Returns the event status register HEAD IDN None Returns the head identification string HOLD None Returns the hold status POWer None Returns the power measurement POWer AUTO 1 Sets the power autoranging mode on or off POWer AUTO None Returns the status of power autoranging POWer MODE 2 Sets the power display units POWer MODE None Returns the power display units POWer OFFSET 1 Sets the power offset multiplier POWer OFFSET None Returns the power offset multiplier Lightwave 10_04 COMMAND REFERENCE Error Messages CHAPTER POWer REFerence 2 Sets the reference for AP measurements POWer REFerence None Returns the power reference level PREselect CHAN 1 Selects on of four preselected wavelengths PREselect CHAN None Returns the preselected wavelength channel being used PREselect SAVE 2 Sets one of the four preselected wavelengths RANge 1 Sets the gain range manual RANge None Returns the gain range auto manual RANge AUTO 1 Sets the autoranging mode on or off RANge AUTO None Returns the status
22. o accelerate the change Press the CAL SET button to complete the calibration The unit returns to real time wavelength and power measurements Remote GPIB Operation User Calibration Remote controlled User Calibration is described in the following procedure It may help to be familiar with the manual calibration procedure listed above before attempting it remotely Identify ambient conditions Block the laser beam from striking the detector of the OMH 6745B Start the calibration by clearing the status registers then zeroing the instrument by issuing the following GPIB commands CLS RANGE AUTO ON ZERO Wait for the zero to finish The controlling software can monitor the status of zeroing by sending the following query in a loop Exit the loop when the response is 1 ZERO Launch a laser of known wavelength and power at the detector of the 6745B Start the calibration by sending the following commands CAL USER ON CAL USER START 20 OMH 6745B Lightwave CALIBRATION Programming a Fixed Offset to Wavelength and Power Measurements Enter the known wavelength using the command CAL WAVESET ss where xxxx xx is the known wavelength and ss is the units um nm or cm Enter the known power using the command CAL POWERSET ss where xxxx xx is the known power and sss is the suffix units pw nw uW mw w or dbm The calibration is complete and the 681
23. of the autoranging RATE 1 Sets the measurement rate RATE None Returns the measurement rate string SECURE 1 Used by service personnel to access PUD TERM 1 Sets the program message terminator TERM 1 Returns the program message terminator TIME None Returns elapsed time since power up TIMER None Returns elapsed time since last TIMER WAVE 2 Sets the wavelength WAVE None Returns the set wavelength WAVE AUTO 1 Sets the auto wavelength feature on or off WAVE AUTO None Returns the set or measured wavelength WAVE MODE 1 Sets the wavelength display units WAVE MODE None Returns the wavelength display units WAVE OFFSET 2 Sets the wavelength offset WAVE OFFSET None Returns the wavelength offset WAVE REFerence 2 Sets the reference for AAmeasurements WAVE REFerence None Returns the wavelength reference point ZERO None Starts the zeroing function ZERO None Returns the status of the zeroing Table 3 1 Device Dependent Commands valid with the OMH 6745B OMH 6745B B 17 Error Messages COMMAND REFERENCE Command Name Parameters Description Expected ATTen 1 Enables disables the attenuation function ATTen None Returns the status of the attenuator Table 3 2 Device Dependent Commands which are not usable with the OMH 6745B BRIGHT T ie BRIGHT DLF COND ESE ERR EN do ESE EVE RECALL ESR HOLD USER EVE IDN POWER WAVESET EVE IST RANGE OPC RANGE OPC RATE PRE RATE PRE S
24. posure time For more information concerning laser and laser diode safety contact the Center for Devices and Radiological Health or ILX Lightwave Lightwave OMH 6745B 1 INTRODUCTION AND SPECIFICATIONS Product Overview wan Refer Servicing only to qualified authorized personnel Available Options and Accessories The OMH 6745B must be coupled to the OMM 6810B Optical Multimeter Other options and accessories available with the OMM 6810B are listed in the instruction manual included with your 6810B 2 OMH 6745B BILA Lightwave INTRODUCTION AND SPECIFICATIONS Specifications The Electro Optic performance specs for the OMH 6745B when coupled to the Specifications CHAPTER OMM 6810B Optical Multimeter are described below All parameters are measured at 25 C Input Specifications Power Range manual wavelength mode 10 nW to 100 mW 50 dBm 20 dBm Power Measurement Accuracy At reference conditions 2 5 950 1500 nm Total4 3 0 950 1500 nm Stability3 10 minutes 0 003 dB 24 hours 0 010 dB Wavelength Range 950 to 1650 nm Power Range auto wavelength mode 1 HW to 100 mW 30 dBm to 20 dBm Polarization Dependency 0 01 dB 1550 nm 0 006 dB 1310 nm Wavelength Measurement Accuracy 0 5 nm Wavelength Temperature Coefficient lt 0 03 nm C Power Temperature Coefficient lt 0 0004 dB C
25. red with a calibrated optical spectrum analyzer or wavelength meter Warm Up Before attempting calibration the OMH 6745B should be allowed to warm up for at least 1 hour after being connected to the main unit Lightwave OMH 6745B 19 7 CALIBRATION T Manual Operation User Calibration Manual Operation User Calibration Front Panel execution of the User Calibration using the OMM 6810B is described in the procedure below Identify ambient conditions and zero the instrument as described in Chapter 2 Connect via fiber optic a laser of known wavelength and power into the OMH 6745B Start the calibration by pressing the CAL USER button to place the unit in User Calibration Mode The LED above the CAL USER button will light Press the CAL SET button to initiate the User Calibration Procedure The left display will show CAL A The measured wavelength is shown on the left display Adjust the displayed power to match the laser s known wavelength using the WAVELENGTH LEFT and RIGHT buttons to select a digit and then use the WAVELENGTH UP or DOWN button to change the wavelength Press the CAL SET button to complete the wavelength calibration The right display will now indicate CAL P The measured power will be shown on the left display Adjust the displayed power to match the laser s known power using the POWER UP and DOWN arrow buttons If large adjustments are necessary hold down the UP or DOWN button t
26. s and Accessories 2 Specifications araia ni ER RUE EX d RAUS 3 Chapter2 Operation Installation 7 Power Up ii e ewe NON A GE Eee ea ee ES 8 Front Panel Controls 8 Unused Functions 9 10_04 OMH 6745B i ko m a Error DISplay peda ctp n ra oe dad Aa 9 Rear Panel Connections 9 Input Connector 9 Analog Output ed CLIE E teddies 10 General Operating Procedures 10 Warm up and Environmental Considerations 10 Fiber Optic Cable Considerations 10 Fiber Optic Connector Options 10 Measuring or Setting the Wavelength 11 oean a Ec Re ERR 11 User Calibration e Eerste Casa yu Sis bap 12 Installing Different Fiber Optic Connectors 12 Care and Maintenance 12 Cleaning cena atas ve ebore edu oh be 13 Chapter 3 Command Reference Common Commands 15 Device Dependent Commands
27. the zeroing process While zeroing the 0 digit walks across both displays the LED above the DISPLAY ZERO indicator flashes Pressing the DISPLAY ZERO button when the DISPLAY ZERO indicator is illuminated disables the effects of the zero The procedure for zeroing the instrument is described below The fiber should be secure to the adapter and the source should either be blocked or turned off e LED above the DISPLAY ZERO indicator is illuminated press the DISPLAY ZERO button once to disable the existing compensation factors 10 04 OMH 6745B 8 11 OPERATION Installing Different Fiber Optic Connectors Press the DISPLAY ZERO button While zeroing the 0 digit walks across the display and the DISPLAY ZERO indicator above the button flashes When zeroing is complete the DISPLAY ZERO button is lighted The process takes about 10 seconds Turn the source on Accurate power measurements are displayed Note If the ambient environmental conditions change e g the room lights are turned on or off or the attenuator is added or removed the instrument must be re zeroed to maintain its accuracy Pressing the DISPLAY ZERO button again disables the compensating factors and the LED above the DISPLAY ZERO button is turned off User Calibration It is possible to calibrate the OMM 6810B OMH 6745B using a laser source of known power and wavelength Pressing the CAL USER button to toggles the instrument in and out of the
28. ve of electric Conductor shock Terminal Caution hot Frame or On In position of a bistable push control or 1 d The slash 1 only denotes that mains are on surface chassis AN Terminal Off Out position of a bistable push control O 1 The circle O only denotes that mains are off or O viii OMH 6745B Il Lx Lightwave WARRANTY ILX LIGHTWAVE CORPORATION warrants this instrument to be free from defects in material and workmanship for a period of one year from date of shipment During the warranty period ILX will repair or replace the unit at our option without charge Limitations This warranty does not apply to fuses lamps defects caused by abuse modifications or to use of the product for which it was not intended This warranty is in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for any particular purpose ILX Lightwave Corporation shall not be liable for any incidental special or consequential damages problem occurs please contact ILX Lightwave Corporation with the instrument s serial number and thoroughly describe the nature of the problem Returning an Instrument an instrument is to be shipped to ILX Lightwave for repair or service be sure to 1 Obtain a Return Authorization number RA from ILX Customer Service 2 Attach a tag to the instrument identifying the owner and indicating the requ
29. verall Dimensions 51 mm x 64 mm x 102 mm Weight lt 0 5 kg Fiber Input Adapters Available FC SC ST Biconic Diamond HMS 10 Radiall VFO DF NEC D4 Radiall EC DIN 47256 4108 Bare fiber to FC Connector to Main Unit3 26 pin high density sub D 3 Reference Conditions Add 0 5 for 1500 nm to 1650 nm Power level 20 dBm CW 550 um step index fiber NA 0 22 Ambient temperature 23 5 AT amp T ST connector Spectral source width lt 10 nm 4 Under the following conditions Add 0 5 for 1500 nm to 1650 nm Fiber lt 200 um NA lt 0 37 Ambient temperature 0 to 55 non condensing Seiko FC PC connector Spectral width lt 10 nm Lightwave 10_04 INTRODUCTION AND SPECIFICATIONS Specifications 5 Minimum optical power to obtain accurate wavelength measurement 1 uW 1200 nm 1650 nm 10 uW 950 nm 1200 nm 6 An antistatic cover is included on the connector to the Multimeter To prevent damage from electro static discharge this cover should remain in place when the Optical Measurement Head is not connected to the Multimeter Our goal is to design and produce the best optical test equipment available anywhere To achieve this we need your ideas and comments on ways we can improve out products We invite you to contact us at any time with your suggestions OMH 6745B 5 INTRODUCTION AND SPECIFICATIONS Specifications 6 OMH 6745B B
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