Owners Manual
Contents
1. ii 37 Hendshaking a sla 37 USB release tl 38 Communication commands silla 42 CoboltiMONItor SO Walras 44 Cobol Monitor Tor MED 3 XAA sa 44 CopoltMonitortor DPE RAXX A a 46 Fiber pigtailed option Cobolt MLD 06 03 occcccccccnocococococococacacacacanancnrorarararacananananananrnrarararncaracananananes 48 roubleshootingalie iaia 49 Warranty and maintenance iniautlae A AAA ia 50 MED as Sen ETE i eae cect A se in ine eect eck 50 DPS a iii A anioe nio i ci liate illo S ali ili l0 50 Service inca 50 Declaration of Conformity CDRH modes Only sccecsecececeececeeeecececuecuceeuecuceeuececeeaecucetsecucetaecucetansas 5 A nile iii lai e zia 51 Cobolt 06 01 Series Cobolt 06 01 Series 1 Introduction The 06 01 Series lasers offer a compact form factor and a wide wavelength span in a plug and play format The 06 01 Series utilizes the most ideal laser technology to achieve the wavelength while maintaining the same form factor The two types of lasers in the series are the Cobolt MLD Modulated Laser Diode and Cobolt DPL Diode Pumped Lasers Cobolt MLD lasers are visible wavelength direct semiconductor diode laser modules capable of operating in both pulsed and continuous wave modes Electronics boards within the Laser Head allow the MLD lasers diode to be modulated at high speed using an external signal Cobolt DPL lasers are visible wavelength diode pumped solid state lasers capable of operating in continuou2. Wavelength precision 5 nm 0 3 nm 5 nm Output power en 100 250 so 100 60 200 60 100 200 sooo 140 100 Polarization extinction ratio gt 100 1 vertical A lt 5 mrad CC mode MLD modulated laser diode DPL diode pumped laser 1 The wavelength for each unit is fixed at a value within the stated range The wavelength is measured in air 2 The output power can be adjusted using Cobolt Monitor software or using computer commands Specifications are guaranteed at 100 of nominal power 3 Relative to bottom and side of base plate 5 1 2 Operational and environmental requirements Oo m w Power supply requirements 5VDC 3A 5VDC 5A Ambient temperature amp pointing 4 lt 5 urad C Maximum baseplate temperature 50 C Maximum heat dissipation of Laser Head Warm up time from complete off lt 3 min Laser Head heat sink thermal impedance at 40 C ambient lt 0 8 K W lt 0 5 K W 4 Specified over a base plate temperature range of 20 50 C ambient 10 40 C 21 Cobolt 06 01 Series 5 1 3 Modulation MLD Only Digital modulation bandwidth DC 150 MHz tor Digital modulation extinction ratio 1 OMHz gt 10 000 000 1 gt 70dB Analogue modulation bandwidth DC 2 MHz Analogue modulation Rise Fall time lt 300 ns Remote ON OFF frequency DC 500 kHz Remote ON OFF extinction ratio l inf Remote ON OFF Rise Fall time lt 300 ns 5 1 4 Mechanical EEE ee ee ee Laser H
3. and when it is low the laser switches off regardless of the digital or analogue state This is a useful way to produce a train of pulses Digital Analogue The MLD has a special mode for hybrid digital analogue modulation This can be accessed in the Cobolt Monitor MLD software under the Modulation Type option In this mode whenever the digital state is on the laser runs at a power determined by the analogue voltage 6 3 2 DPL Modulation is not available for DPL lasers 37 Cobolt 06 01 Series 7 Operation via data port 7 1 Data port connections 7 1 1 MLD There are three ways to connect the Cobolt 06 01 Series MLD laser to a data port note that the user should avoid communicating via multiple interfaces simultaneously rather using one data port per interface The data connections are located as follows e Mini USB connection on the Laser Head for USB communication The USB cable is provided with all MLDs 15 pin D SUB connection on the Laser Head OEM model For communication is via RS 232 See section 5 4 for the pin assignment this cable is not standard and is not available from Cobolt e 9 pin D SUB RS 232 connection on the Control Box CDRH model Communication is via RS 232 The Sub D 9 RS 232 cable is a standard cable but is not provided by Cobolt 7 1 2 DPL The Cobolt 06 01 Series DPL laser can be connected to a data port via mini USB connection on the Laser Head for USB communication There is no RS 23
4. Control Box which must be connected for the laser to operate When the key is off the diode is prevented from emitting The key must be actively turned to the ON position each time the laser is powered on Information LEDs The Control Box which is part of the CDRH models incorporates information LEDs which display whether power is connected the laser is on or a fault has occurred The LASER ON LED is illuminated whenever the device is emitting or could emit light 2 3 Equipment Safety Always install the laser system to a properly grounded power outlet Cobolt lasers contain a laser diode which is sensitive to electrostatic discharge ESD Laser light reflected directly back into the laser head can be damaging to the laser diode Cobolt 06 01 Series 2 4 Warning and identification labels The upper face of the Laser Head contains a yellow label with laser safety warning and classification information the wavelength and maximum power of the unit It also shows the location of the laser beam from the aperture and indicates the open and closed positions of the manual shutter This label must be visible unless the laser beam is totally enclosed There is a silver label showing information about the laser model and manufacturer and the power supply voltage and current is located both on the laser head and on the bottom of the Control Box 2 3 1 MLD Cobolt MLD 638 nm 0638 06 01 0140 100 S N 1234 Made in Sweden 05 2
5. displays whether Autostart is enabled or not if the laser is in CDRH or OEM mode and if the 5V direct input is enable or not This section also displays the current laser status There are also buttons to abort the auto start sequence or restart the laser Under the Laser Diode Settings section the user can switch constant power mode and constant current mode Corresponding enter boxes are found to allow the user to set the constant power level and constant current level The output power as monitored measured on an internal photodiode and the current through the laser diode are both displayed Under General there is a Clear Fault button This can be used to restart the laser after the interlock has been removed and re inserted There is also a Refresh button that is used to update the display in the GUI after issuing manual commands 48 Cobolt 06 01 Series 9 Fiber pigtailed option Cobolt MLD 06 03 The Cobolt MLD Series lasers of high performance diode laser modules can be supplied with an ultra compact and robust fiber delivery option Cobolt MLD 06 03 The fiber is permanently aligned and fixed inside the laser sub package using Cobolt HTCure Technology ensuring stable optical output and high polarization extinction ratio PER gt 100 1 over a large temperature range as well as very high level of insensitivity to transport conditions The standard 06 03 configuration is 1 m SM PM fiber with 3 mm jacketing and FC APC output
6. feature can be accessed via a socket on the control Box CDRH model or pin 11 on the Laser Head s D SUB OEM model The on off modulation socket is connected to a floating voltage line When this line is grounded or forced to zero the laser automatically enters on off modulation mode in the off state The laser will remain in on off mode until the laser is restarted Note that only a very small current lt 500 uA must flow in order to ground the circuit A 0 5 V TTL signal should be applied to modulate the laser and the duty cycle is set by the input signal The on off modulation socket takes a 3 5 mm stereo audio plug The plug should be connected as shown in the figure below 33 Cobolt 06 01 Series at eS 5V Ground In the Cobolt Monitor MLD there is a tick box On Off Modulation which indicates when on off modulation is active When this is the case all other modes are greyed out although the previous mode remains checked as the laser remembers which mode it was in previously The laser automatically detects when an on off modulation signal is present and enters on off modulation mode so there is no need for the user to check the On Off Modulation box manually In the box to the left of this tick box the user can set the peak power level that the laser will modulate up to This is set in the factory to the laser s nominal maximum power level If the laser is in analogue or digital modulation mode when it ente
7. must be attached to a heat sink providing a thermal resistance of lt 0 5 K W Heat Sink Requirements 06 81 2 5 20 Q O g 15 Oo D Q ho fo E 05 D E E 0 0 0 10 20 30 40 50 Ambient Temperatures T C Figure 2 4 1 Heat Sink Requirements DPL Cobolt 06 01 Series 3 6 Power supply requirements An appropriate Power Supply Unit PSU is supplied by Cobolt with the laser and can be plugged into a standard power outlet The power supply accepts 90 264 VAC and 47 63 Hz Ripple and noise 1 peak peak max 20 MHz bandwidth Accepted voltage range for the Laser Head is 5 0 0 5 VDC Specification values are given at 5 VDC 3 6 1 MLD The output from the Cobolt supplied PSU is 5 VDC and the maximum current is 3A max 15W 3 6 2 DPL The output from the Cobolt supplied PSU is 5 VDC and the maximum current is 5A max 25W 4 Quick start guide for CDRH model 4 1 MLD 4 1 1 Continuous wave quick start 1 Mount the laser on a heat sink or suitable flat surface that provides adequate heat dissipation and connection to ground Use the four holes on the laser s base plate to secure it P 2 Attach the 15 pin D SUB cable to the Laser Head 3 Attach the 15 pin D SUB cable to the Control Box 4 5 6 Cobolt 06 01 Series Insert the interlock plug into the connector on the Control Box Connect the supplied 5V power supply unit to the socket on the Laser Head and plug it in to the main
8. sink or suitable flat surface that provides adequate heat dissipation and connection to ground Use the four holes on the laser s base plate to secure it n Cobolt 06 01 Series 2 Attach the 6 pin Molex cable to the Laser Head Be sure the orange arrow is facing the top labelled side of the laser head 3 Attach the 6 pin Molex cable to the Control Box Be sure the sure the orange arrow is facing the top side of the control box Once the Molex cable has been inserted special tooling is required to remove it Attempts to remove it by force may damage the cable 4 Insert the interlock plug into the connector on the Control Box Cobo rt 5 Connectthe supplied 5V power supply unit to the socket on the Laser Head and plug it in to the mains Cobolt 06 01 Series To start the laser turn the key on the Control Box clockwise to the ON position If it is already in the ON position turn it to OFF and then ON again Light will be emitted when the TECs have stabilized Once the key is turned it can take seconds for the TECs to reach their set temperature at which time the laser will begin to emit without further action from the user 20 Cobolt 06 01 Series 5 System description 5 1 Specifications Disclaimer Specifications are liable to change at Cobolt s discretion 5 1 1 Optical AA o MLD 445 MLD 473 MLD 488 MLD 515 DPL 532 DPL 561 MLD 638 MLD 660 Wavelength ar 5321 sera 638 660
9. to 0 VDC on pin 3 will turn the laser off and put the laser in stand by mode status LED is POW and not flashing This input only controls the 27 Cobolt 06 01 Series on off state of the laser and cannot be used to modulate the power output A diagram of the direct control electronics is shown below The interlock connection between pin 1 and 2 must also be made as described above 28 Cobolt 06 01 Series 5 5 Pin assignment 5 4 1 MLD The pin configuration for the 15 pin D SUB on the MLD Laser Head and control box are described in the table below MLD model LED1 Laser on 5 aa la DE 15P Male Plug Front View finte Interlock 5 1 a esee ee a 15 1 DE 15S Female Socket Front View The pin configuration for the RS 232 socket on the MLD control box MLD model 1 5 6 Q RS232TX DE O9P Male Plug Front View RS232RX i 6 7 Not connected Not connected VBUS 29 Cobolt 06 01 Series 5 4 2 DPL The Molex 90130 3206 pin configuration on the DPL Laser Head and control box is described in the table below Note the pin orientation with respect to the lock on the socket The socket on the laser head is inverted when compared to the figure below pin 6 in on the top right Pin PRIORE Pin 1 OV Ground Pin 5 Pin y j i Maat int o 6e uepzeemon 30 Cobolt 06 01 Series 6 Operations instructions 6 1 Start up procedure 6 1 1 MLD When deliver
10. 0 23 gt OD 3 Cobolt DPL 532 nm 200 78 gt OD 3 Cobolt DPL 561 nm 100 19 gt OD 3 Cobolt MLD 638 nm 140 54 gt OD 3 Cobolt MLD 660 nm 100 39 gt OD 3 MLD modulated laser diode DPL diode pumped laser Irradiance W cm2 110 of Nominal Power W Beam Area at bottom tolerance cm2 Eye protection OD Logio 60825 1 Emission Limit Class 1 W Max Power W rounded up to the next integer 2 1 1 Fiber pigtailed 06 03 Based on 60825 1 Laser Safety standard the accessible emission from any laser must be considered at a viewing distance of 100mm At that distance the beam diameter of a divergent beam exiting from a fiber pigtailed laser will always be greater than the Beam Area at bottom tolerance cm2 of the collimated beam used in the calculations above therefore the irradiance W cm will also be lower CAUTION use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure Cobolt 06 01 Series 2 2 Safety features Interlock The laser is equipped with a remote interlock that prevents current flowing through the diode when it is open See section 5 3 for a detailed description of the interlock Mechanical shutter The Laser Head is equipped with a mechanical shutter that blocks light emission The open and closed positions of the shutter are indicated on the Laser Head Key switch The CDRH model comes with a
11. 014 Input VDC 5 V Imy 3A Cobolt AB Vretenvagen 13 SE 171 54 Solna Sweden Cobolt MLD 638 nm CE marking for CDRH models only label underneath 0638 06 01 0140 200 i OEM LASER SIN 1234 mis Made in Sweden 05 2014 Input VDC 5 V I mx 3 A Cobolt AB Vretenv gen 13 SE 171 54 Solna Sweden OEM Label Complies with 21 CFR 1040 10 and 1040 11 except for deviations pursuant to Laser Notice No 50 dated June 24 2007 CDRH models shipped to USA Cobolt 06 01 Series 2 3 1 DPL Cobolt DPL 532 nm 0532 06 81 0200 100 S N 1234 Made in Sweden 05 2014 Input VDC 5V Imy 5A Cobolt AB Vretenvagen 13 SE 171 54 Solna Sweden CE marking for CDRH models only N lt label underneath TENDE MLD 0638 06 01 0140 200 S N 1234 OEM LASER DEVICE Made in Sweden 05 2014 Input VDC 5 V Imx 3 A Cobolt AB Vretenv gen 13 SE 171 54 Solna Sweden LIGHT IS EMITTED FROM g OEM Label A RI L 4 tea ta 2 Max powe UVavele 19 7 Complies with 21 CFR 1040 10 and 1040 11 except for deviations pursuant to Laser Notice No 50 dated June 24 2007 CDRH models shipped to USA Cobolt 06 01 Series 3 Overview 3 1 Model Number The 06 01 Series lasers are sold in two configurations CDRH and OEM described below The models numbers are composed as described below 3 1 1 MLD Free Beam XXXX 06 01 XXXX YYY x Wavelength nm Version Power mW Conf
12. 2 communication on the DPL The USB cable is provided with all DPLs 7 2 Baud rates amp serial port settings Each system is shipped from the factory with a fixed baud rate 115200 which cannot be changed in the field The other serial port parameters are 8 data bits 1 stop bit and no parity Hardware flow control is not supported Each command must be terminated by a carriage return All commands are case sensitive Leading and trailing white Space is ignored but command arguments must be delimited by a single space character ASCII 32 7 3 Handshaking Under no circumstances does the system initiate communication it only transmits characters in response to a message Every message generates a response either a numerical value or the acknowledgment string OK In the event that the system receives a message that it cannot interpret it responds Syntax error illegal command Every system response is terminated by a carriage return ASCII 13 and a full stop is used with floating numbers 38 Cobolt 06 01 Series 7 4 USB driver The MLD and the DPL lasers use the same driver to connect to the laser via USB The USB driver must be installed and can be downloaded from the Cobolt website www cobolt se When installed a virtual COM port will be created to communicate with the laser To install the USB driver in Windows 7 follow these instructions 1 Goto the Control Panel and choose Hardware and Sound ION Co
13. 25 1 CDRH 21 CFR 1040 10 and 1040 11 EMC IEC 61326 1 EN55011 class A EN61000 4 X where X 2 3 4 5 6 and 11 FCC Part 15 subpart B class A All Cobolt MLD and DPL lasers are RoHS compliant as defined by the EU Directive 2011 65 EU 14 Disclaimers Cobolt will assume no responsibility for damage incurred by faulty customer equipment such as measurement equipment cables etc used in conjunction with Cobolt lasers Cobolt makes no warranty of any kind with regard to the information contained in this guide included but not limited to implied warranties of merchantability and suitability for a particular purpose Cobolt shall not be liable for errors contained herein nor for incidental or consequential damages from the furnishing of this information No part in this manual may be copied reproduced recorded transmitted or translated without the express written permission by Cobolt KG Cobolt Cobolt AB Vretenvagen 13 SE 171 54 Solna Sweden Australia Warsash Scientific Pty Ltd Phone 61 2 9319 0122 Fax 61 2 9318 2192 www warsash com au China China Daheng Group Phone 86 10 8278 2668 Fax 86 10 8278 2669 www cdhcorp com Estonia Latvia Lithuania Optek Ltd Phone 37 129 781 582 Fax n a www optek lv India New Age Instruments and Materials Phone 91 124 4086513 16 Fax 91 124 2331653 www newagein com Italy Optoprim S r l Phone 39 39 834 977 Fax 39 39 284 5269 www optoprim it
14. 27 www newopto com Germany Austria Switzerland Von Gegerfelt Photonics Phone 49 6251 860 99 20 Fax 49 6251 860 99 17 www vgphotonics eu Israel Lahat Technologies Ltd Phone 972 4 999 0151 Fax 972 9 76 46 204 www lahat co il Japan Pneum Co Ltd Japan Phone 81 48 985 2720 Fax 81 48 985 27 21 www pneum co jp Singapore Malaysia Thailand Photonitech Asia Pte Ltd Phone 65 6749 9031 Fax 65 6233 9171 www photonitech com Taiwan Tayhwa Technology Co Ltd Phone 886 2 23569737 Fax 886 2 23569659 www tayhwa com tw
15. Co DO t Owners Manual Model 06 01 Series May 2014 rev 1 5 Cobolt 06 01 Series lasers High performance diode laser modules and diode pumped solid state lasers 405 nm 532nm 445 nm 561nm 473 nm 638 nm 488 nm 660 nm 5l5nm Cobolt AB Phone 46 8 54591230 info cobolt se Vretenvagen 13 Fax 46 8 54591231 www cobolt se SE 171 54 Solna Sweden Cobolt 06 01 Series nl ZA Dd 2 3 2 4 Sali B32 3 3 3 4 dd 3 6 4 1 4 2 5 1 Did ddt 54 Dud 6 1 6 2 6 3 Pale Dudo 7 3 7 4 Fade 8 1 8 2 10 11 11 2 12 13 14 Cobolt 06 01 Series INtTodU coca di 5 Field 6 Generali ira 6 SALLY TE AUTOS lalla A A 7 EGUMEN Salte doce ies bledo it 7 Warning and identiticationdabels di a Saa 8 UV ida tas 10 Model OUI Otek ore oat ea as lattice o iio un ely i 10 COnFigurarion zo a alici ia 11 ECT An RP a 12 CONTO BO radios 13 TRermalmanag e ment dialisi oa 14 Power Supply requitementS essa di ido eaenee 15 Quick start guide fof CDRH Models nale 15 MED toilet dae illa 15 A E e A 17 System descrita 20 SPECE ON S eia y 5 a T a N 20 DigGR cca 22 o A eat 25 Direct ON OFF Control IDPL ONIY incida aiar aporia 26 PILAS SIA A A A AAA A lia 28 Operations INStructons sonic diria 30 nn aaa 30 CORUALOUS WI o TS e a ias 31 Modan cosa odian 32 Operation via data DOT las 37 Data POFECONAGCHONS spiattellato dio ed de e ll O O cd da he 37 Baud rates amp serial port settings
16. Head the auto start procedure will begin Light will be emitted once the interlock is connected the shutter is open and when the key is turned to the ON position CDRH model Start up operation li Mount the Laser Head on a suitable heat sink see section 3 5 CDRH model Insert the interlock into the control box 31 Cobolt 06 01 Series 3 OEM model Insert the interlock into the laser head 4 Apply 5 VDC to the power supply connector on the laser head 5 CDRH model Turn key switch to start the laser 6 CDRH model Once the TECs have stabilized the ON LED is illuminated 7 The laser starts light is emitted The power and wavelength may continue to drift for up to 3 minutes while the thermoelectric coolers TECs stabilize Closedown operation 1 CDRH model Turn the key to the OFF position 2 Disconnect PSU from mains outlet 3 Disconnect Laser Head from PSU 6 2 Continuous wave 6 2 1 MLD The laser has two continuous wave operating modes constant power and constant current The default mode for Cobolt MLD lasers when shipped is constant current In constant current mode the laser runs at a set current level In constant power mode the power is monitored on an internal photodiode and this is used to regulate the current to maintain a constant power level When continuous wave operation is desired it is recommended to operate in constant current mode since the power is more stable over long periods and
17. Poland Amecam Phone 48 22 207 22 78 Fax 48 22 207 22 77 www amecam pl South Korea SM Tech Phone 82 42 8244413 Fax 82 42 8244414 WWW lasersystem co kr UK amp Ireland Laser Lines Ltd Phone 44 1295 672 500 Fax 44 1295 672 550 www laserlines co uk Contact Information Cobolt headquarters Phone Fax E mail Web 46 8 545 91 230 46 8 545 91 231 info cobolt se www cobolt se Sales representatives Benelux Laser 2000 Benelux CV Phone 31 297 266 191 Fax 31 297 266 134 www laser2000 nl China DynaSense Photonics Co Ltd Phone 86 0 10 83503853 Fax 86 0 10 83503622 www dyna sense com France Optoprim Phone 33 1 4190 6180 Fax 33 1 4190 6189 www optoprim com India Dynotech Instruments Pvt Ltd Phone 91 124 4086513 16 Fax 91 124 2331653 www dynotech in Japan Kantum Electronics Co Ltd Phone 81 3 37581113 Fax 81 3 37588066 www kantum co jp Russia amp Belarus Azimuth Photonics Phone 7 495 792 39 88 Fax 7 495 958 23 09 www azimp ru Spain amp Portugal Laser Technology SI Phone 34 93 750 0121 Fax 34 93 750 0323 www laser technology com USA Cobolt Inc Phone 1 408 708 4351 Fax 1 408 490 2774 www coboltinc com Brazil Photonics Instrumentos Phone 55 11 2910 6852 Fax 55 11 2910 6852 www photonics com br China New Opto Technology Corporation Telephone 86 571 8515 2711 Fax 86 571 8515 27
18. aser head assembly The laser assembly is equipped with elements for temperature control of the cavity and pump diode The laser also features an optical feed back loop which ensures long term power stability of the emitted visual beam The Laser Head features a manual mechanical shutter as well as a laser hazard label and a laser classification label The Laser Head can take electrical power from the power jack The mini USB is used to communicate with the laser In addition the Laser Head supplies a Molex 6 pin connection of which the pin 1 and pin 2 are used for the interlock See section 5 4 for further information on connector pin out 3 4 Control Box 3 4 1 MLD The optional Control Box allows the user to operate the laser with a CDRH compliant key switch It also provides direct connections for analogue modulation and on off modulation The Control Box has LEDs to indicate the laser status When power is supplied to the Laser Head regardless of on off or key switch state the temperature control elements will be active to reach set point values The status of the laser operation is given via LED indicators POWER Green Power is supplied ON Orange Laser emission is on This light is always on in modulation mode if laser emission is possible ERROR Red An error has occurred 3 4 2 DPL The optional Control Box allows the user to operate the laser with a CDRH compliant key switch The Control Box has LEDs to indicate the laser sta
19. bolt 06 01 Series 32 bit unasigned integer 0 disabled 1 enabled Returned value 0 disabled 1 enabled Returned value 0 disabled 1 enabled 0 disabled 1 enabled 0 disabled 1 enabled O Off 1 Waiting for key 2 Continuous 3 On Off Modulation 4 Modulation 5 Fault 6 Aborted Analogue and digital modulation states are independent To switch from analogue to digital modulation it is necessary to disable analogue and enable digital 44 Cobolt 06 01 Series 8 Cobolt Monitor software The Cobolt Monitor software provides a graphical way to monitor the laser performance and to change power operation mode and other settings The software works with Windows Vista XP and 7 and requires Microsoft NET 2 0 or higher to run The software can connect to the laser either via RS 232 MLD only port or via USB One GUI should be used per data port The software is different for the MLD and DPL lasers For instructions on connecting the laser and installing the USB driver see section 7 4 8 1 Cobolt Monitor for MLD 3 X X X 8 1 1 Installation Microsoft NET 2 0 or higher is required to run the Cobolt Monitor software and this will be installed automatically if you do not already have the correct version Follow the following steps to install the software 1 Extract the archive and run the setup file 2 Accept the Microsoft NET framework EULA 3 Setup will now connect to the intern
20. ck Molex connector for short circuiting interlock Laser Head Only OEM model 3 3 Laser Head 3 3 1 MLD The Laser Head contains the laser diode beam shaping optics a thermoelectric cooler TEC and integrated control electronics boards The laser assembly is also equipped with elements for temperature control of the pump diode and the system contains an optical feed back loop which measures the power of the emitted visual beam The laser systems incorporates beam shaping optics to provide a collimated circular beam of fixed diameter irrespective of wavelength The Laser Head features a manual mechanical shutter as well as a laser hazard label and a laser classification label The Laser Head can take electrical power from either the power jack or 15 pin D SUB connector The D SUB OEM model only and the mini USB can each be used to communicate with the laser In addition the Laser Head features an SMA connector for the digital modulation input and a 2 5mm socket for the interlock 3 3 2 DPL The Laser Head contains diode pumped solid state laser DPSSL with intra cavity frequency doubling The resonators are stabilized with a curved mirror which provides a beam with excellent mode quality The laser beam is expanded in a telescope The residual IR radiation from the pump diode and the DPSS laser is contained within Cobolt 06 01 Series the laser housing by filtering optics The control electronics boards are integrated into the l
21. connector non collimated but the design is intended for OEM use and type of fiber connector and lengths can be customized The output power is specified as out of the fiber The fiber is equipped with a removable end cap on the The fiber end cap serves as the mechanical shutter of the laser system It is important to always make sure the fiber end face is clean before turning the laser on and before connecting the fiber connector in physical contact with another connector Failure to do so may lead to irreparable damage of the fiber end face Do not clean the fiber when the laser is on We recommend using appropriate equipment for fiber cleaning and inspection All safety instructions in section 2 of this manual also apply to fiber pigtailed lasers Please refer to the Cobolt website for updated information on available output power models from the Cobolt MLD 06 03 models Cobolt DPL lasers are not available with the fiber pigtailed option Cobolt MLD Cobolt MLD 638 nm 638 nm 0638 06 03 0075 100 0638 06 03 0075 200 A OEM LASER S N 1234 S N 1234 DEVICE Made in Sweden 05 2014 Made in Sweden 05 2014 Input VDC SV Imy 3A Input VDC 5 V I yy 3 A Cobolt AB Vretenv gen 13 Cobolt AB Vretenvagen 13 SE 171 54 Solna Sweden SE 171 54 Solna Sweden Manufacturer s identification labels Framnla Hazard Svmbhoal and Anartura 2hal right CDRH model left OEM model 49 Cobolt 06 01 Se
22. disable autostart O disable 1 enable cobas Get autostart enable state 0 disabled 1 enabled I Laser ON Requires autostart disabled lO Laser OFF p Get output power set point Float W p Set output power Float W pa Read output power Float W i Get drive current Float mA sic Set drive current Float mA cp Enter constant power mode ci Enter constant current mode f Get operating fault O no errors cf Clear fault 1 temperature error 3 interlock error 4 constant power time out gsn cobasky cobasky 43 Get serial number Get Key Switch enable state Enable disable key switch The following commands are valid on the DPL model only Command cobasdr cobasdr The following commands are valid on the MLD model only Command em gdmes sdmes games sames galis salis gom Function Enable disable direct control See sect 8 4 for description OEM models Get direct control enable state Function Enter modulation mode Get digital modulation enable state Set digital modulation enable state Get analogue modulation enable state Set analogue modulation enable state Get analogue low impedance 50 Q state Set analogue low impedance 50 Q state Returns the current operating mode O disable 1 enable Argument O disable 1 enable Argument O disable 1 enable O disable 1 enable O disable 1 enable Co
23. dulation switch The on off modulation feature is designed for this purpose Interlock connector To use the interlock with an external switch connect a stereo plug instead After the interlock has been opened the laser will need to be reset before it can be used again After closing the interlock turn the key to the OFF position and back ON again CDRH model only This can also be achieved with the command cob1 When the interlock signal is disconnected from the system ground OV the laser diode switches off After closing the Interlock again to ground the function can be resumed via computer control or by resetting the power supply or key switch CDRH model The signal level is between OV and 5V with a pull up resistor R142 R141 and the current required to ground the interlock is 5 mA The time delay in the hardware is lt 1 ms but after filtering by the firmware the reaction time is extended to lt 20 ms A diagram of the interlock electronics is shown below IL 1 5V 3V3 LASER HEAD i 2 CONNECTOR ssi D141 KEY BOX PE M 7 BAVOOW CONNECTOR LA HDSUB 1k 0603 4 4 IL CONNECTOR rr ad L I i 1 6 To Processor i 2 10 4k7 oe C142 100n KEY BOX INTERLOCK 0603 Connected to cover and OV power input 26 Cobolt 06 01 Series 5 3 2 DPL The OEM configuration the DPL interlock is located at pin 1 and 2 of the Molex connector on the back side of the laser head To use the interlock with an e
24. ead dimensions 100x40x40 mm weight lt 03 ke 5 1 5 Electrical interfaces MLD model 5 1 6 Electrical interfaces DPL model 22 Cobolt 06 01 Series 5 2 Diagram Diagrams are shown below of the Laser Head and Control Box showing dimensions in mm and connectors 5 2 1 MLD Laser Head Interlock Digital modulation mi O input eme 1 Gi A 5V DC LY H D sub 15 pin Mini USB 23 Control Box Frontpanel Rearpanel RS 232 CIT OE 82 80 Cobolt 06 01 Series 24 Cobolt 06 01 Series 5 2 2 DPL Laser Head Molex 6 pin Interlock Mini USB Note the Molex 6 pin orientation on the laser head is inverted with respect to the drawing in section 5 4 2 Control Box Key Switch LED indicators 3 5mm Interlock Molex 6 pin connector od d 43 50 25 Cobolt 06 01 Series 5 3 Interlock The laser is equipped with an interlock that prevents current flowing through the diode when the circuit is open The interlock socket is located on the back of Laser Head The laser is supplied with mating plug which will close the interlock The lasers is sold with a mono plug that allows the interlock 5 3 1 MLD The MLD interlock is a 2 5 mm female stereo TRS audio socket The ring and sleeve see figure must be connected for the laser to operate The interlock should not be used as a mo
25. ed MLD lasers are by default set to continuous wave constant current mode As soon as power is supplied to the Laser Head the auto start procedure will begin Light will be emitted once the interlock is connected the shutter is open and when the key is turned to the ON position CDRH model Start up operation If you have the CDRH model see the quick start guide section 4 for a pictorial guide to connecting up the laser The procedure for starting the laser is given below Lc 2 Mount the Laser Head on a suitable heat sink see section 3 5 Insert the interlock into the Laser Head CDRH model Connect the laser to the Control Box using the 15 pin D SUB cable Apply 5V DC to either the power supply connector or the appropriate pins on the laser s D SUB see pin assignment in section 5 4 CDRH model The POWER LED is illuminated CDRH model Turn key switch to start the laser The laser starts light is emitted The power and wavelength may continue to drift for up to 3 minutes while the thermoelectric cooler TEC stabilizes CDRH model the ON LED is illuminated Closedown operation 1 de CDRH model Turn the key to the OFF position Disconnect PSU from mains outlet Disconnect Laser Head from PSU CDRH model Disconnect Laser Head from Control Box only required for shipping 6 1 2 DPL When delivered DPL lasers are by default set in constant power mode As soon as power is supplied to the Laser
26. ed in section 5 3 In the software check that Interlock Fault is not displayed Send the command ilk to confirm the interlock is not open returns a 1 if closed If it is verified that the interlock system is closed yet an interlock fault is returned contact Cobolt technical support Laser emission stops Ensure the laser has adequate heat sinking MLD Only Check the base plate temperature this is displayed in the Cobolt Monitor software If it is outside of the range 20 50 C the laser may take longer to stabilize the temperature or be unable to do SO Check that the interlock is connected Send the command f If fault code 1 is returned check that the heat sink is adequate and that the ambient temperature is under 40 C If fault code 3 is returned see interlock fault checklist If fault code 4 is returned there may be a problem with the constant power system Contact Cobolt technical support Low power Check that the laser is in constant power mode using the GUI or the cp command Check the power reading using the GUI or the pa command MLD Only If this does not agree with the real output power re calibrate by measuring the power and entering it in the Power Cal box in the software MLD Only Remove any connector from the ON OFF MOD socket on the Control Box or pin 6 on the Laser Head s D SUB in OEM mode then restart the laser Send the command f If fault code 4 is
27. erent specifications Below is a brief guide to deciding which modulation type to use e On off modulation is quick to set up and requires no computer connection It allows for the highest extinction ratio Use this mode if you are modulating at speeds below 500 kHz in a square wave e Digital modulation allows for extremely fast modulation speeds of up to 150 MHz with a rise time of under 2 5 ns Use digital modulation if you are modulating at high speeds in a square wave e Analog modulation is not as fast as digital 2MHz but has the advantage that the user can drive the laser with arbitrary waveforms Use this mode if you require arbitrary pulse shapes These types of modulation can be used simultaneously in any combination to give complicated output shapes such as pulse bursts These combinations are dealt with separately at the end of this section Switching between modes can be done using the Cobolt Monitor MLD software or with RS 232 commands except for on off modulation which is activated automatically when connected The modes are described in detail below On off modulation On off modulation is the simplest modulation mode and can be used out of the box with no connection to a computer It allows the user to completely shut off the diode between pulses giving it a theoretically infinite extinction ratio It does however have the narrowest bandwidth and slowest switching times of the three modulation modes The on off modulation
28. et and download Microsoft NET if it is required 4 After a few security screens setup will install NET and Cobolt Monitor MLD A shortcut to the monitor software will be placed on the desktop and the program will run 8 1 2 Software instructions With the laser connected and powered select Options from the Tools menu The Port name drop down box shows a list of available COM ports Select the port which the laser is connected to and click OK If the laser is connected via USB it usually has the highest COM port number Com Port Settings Serial Port Port Name COM3 Baud Rate 115200 To connect to the laser choose Connect from the File menu The window should now show the correct laser Status along with various readings such as the laser power and current The different sections of the user interface are described below 45 Cobolt 06 01 Series Cobolt Monitor for MLD 3 0 0 17 File Tools Help Temperatures Base Plate Baseplate G CO DO t Temperature 2 Fault Vos Digital 50 Ohm PowerOn Analog e 1kOhm LaserOn Digital Analog Error D OEM Mode Operation Modulation Mode O mW E On Off Modulation Set Constant Power 0 mW Set Constant Current 20 0 mA Power Cal mv Fault Aone Modulation Type Analog Impedance LEDs 7 Refresh Clear Fault default settings COM4 115200 S N 1 Fw Ver 6 61 The Tempe
29. gt I Monitors gt Network adapters a gt Other devices Portable Devices gt JM Processors D Sound video and gt lll System devices gt Universal Serial Bug 9 2 for hardware changes Properties Launches the Update Driver Software Wizard for the selected device On the next screen chose the Browse my computer for driver software option Ey Device Manager File Action View Help 92 GEE Eess 0 Update Driver Software Cobolt Laser Driver MLD How do you want to search for driver software Search automatically for updated driver software Windows will search your computer and the Internet for the latest driver software for your device unless you ve disabled this feature in your device installation settings gt Browse my computer for driver software Locate and install driver software manually Click browse and find folder on your computer where the USB driver is stored 40 gy Device Manager File Action View Help cs Ol F RS Cobolt 06 01 Series Browse for driver software on your computer Search for driver software in this location C Users Simon Desktop Include subfolders gt Let me pick from a list of device drivers on my computer This list will show installed driver software compatible with the device and all driver software in the same category as the device 41 Cobolt 06 01 Series 6 Windows security may warn you that the
30. he File menu The window should now show the correct laser Status along with various readings such as the laser power and current The different sections of the user interface are described below 47 Cobolt 06 01 Series gt CoboltMonitor 4 0 2 0 AE File Tools Help TEC Settings TEC Board TECH Enabled Running Drive lt Settemp Temp EMI o m 2 0 00 oo mE Sy so E A Laser Diode Settings Autosta 3 2 Set Power SOLO mw Power 500 mii Enabled CO Set Curent 2400 m Current 2375 m C CDRH Key Switch Power Cal rei C Direct Input 5 G Cobolt Photo diode voltage 1 665 Y Set warm up current 2400 m OEM Mode Fau one Sel wam up time 60 Completed 5 General Macro Genb Jive0691_3W Rev bd COMI1 115200 Serial No 1 Fw Ver 6 081 0010 Operating Hours 1475 01 The TEC Settings section displays the temperature of the Laser Head s three internal thermoelectric coolers TECs along with the fault status The LEDs section displays the lasers status These are displayed even if the laser is in OEM mode Note that in the DPL case the LED section does not correspond to any physical LED s POWER Green Power is supplied ON Orange Laser emission is on This light is always on in modulation mode if laser emission is possible Laser Lock Orange Laser light is on and the output power has been locked to set point ERROR Red An error has occurred The Autostart section
31. iguration 100 CDRH 200 OEM Fiber Pigtailed XXXX 06 03 XXXX YYY MANN Wavelength nm Power mW Configuration 100 CDRH 200 OEM 3 1 2 DPL XXXX 06 81 XXXX YYY N Wavelength nm Version Power mW Configuration 100 CDRH 200 OEM Cobolt 06 01 Series 3 2 Configuration 3 2 1 CDRH The laser is supplied with a Control Box which must be connected along with the interlock Laser emission starts when the key is turned from the OFF position to the ON position The status of operation can be monitored via LEDs on the Control Box Setting the key to its OFF position puts the laser in stand by mode The CDRH model is CE and CDRH compliant Cobolt 06 01 Series The CDRH model consists of e Laser Head e Control Box Keys e 5V power supply unit e Interlock mono jack for shorting interlock e USB communication cable MLD MLD with Control Box DPL with Control Box e 15 pin D SUB male male cable between laser head and control box DPL e 6 pin Molex cable between laser head and control box 3 2 2 OEM The Laser Head is supplied without the Control Box Connecting a 5 VDC power supply to the Laser Head initiates an automatic start up sequence If the interlock is connected laser emission will start automatically as soon as power is supplied The OEM model consists of e Laser Head e 5V power supply unit e USB Communication cable MLD e Interlock mono jack for short circuiting interlock DPL e Interlo
32. ly above zero to the current that gives the laser s nominal power The laser diode has a threshold current below which no laser light is emitted and above which the optical power is approximately linear with current The figure below contains a typical power vs current graph for a 405 nm MLD laser showing this behavior When modulating with an arbitrary waveform the user should use a DC offset on the signal generator such that the laser is modulated from this threshold point to the desired maximum signal level The threshold level varies between laser models and from unit to unit but the user can find it by applying a variable DC voltage to the analogue modulation input and looking for the lowest voltage where laser light is emitted The amplitude and DC offset of the input signal should then be set so that it modulates from this point up to 1 V Note that although the diode does not emit laser radiation below threshold it still emits some light modulating from 0 V will therefore give the best possible extinction ratio 35 Cobolt 06 01 Series 140 120 100 80 60 Power mW 40 20 Current mA Power vs Current for a typical 405 nm MLD laser The user is given the choice of two impedance values for the laser s analogue modulation circuit 1 kOhm and 50 Ohm The impedance value can be toggled either in the Cobolt Monitor MLD software or by RS 232 commands The default impedance is set to 1 kOhm and for most cases it is recom
33. mended to use this value When using a 50 Ohm signal generator the rising and falling edges of the output may suffer ringing due to the impedance mismatch a problem which can be solved by setting the impedance to 50 Ohm Using the low impedance will cause more of the power to be dissipated in the signal generator so in order to modulate up to full power the user should monitor the voltage across the laser device to ensure that it reaches 1 V To modulate at frequencies over 300 kHz it is necessary to increase the voltage above 1 V The figure below shows the typical input voltage required to achieve a peak power that is 100 of the laser s nominal maximum power assuming a sinusoidal input modulating from laser threshold 4 5 4 0 3 5 3 0 2 5 Peak input voltage V 2 0 o 500 1000 1500 2000 Modulation frequency kHz Input voltage required to achieve 100 peak power as a function of modulation frequency for a typical MLD laser Modulation mode combinations In addition to the three modulation modes described above the Cobolt MLD can be operated under any combination of modes 36 Cobolt 06 01 Series On off another mode Any mode can be operated in combination with on off modulation When the laser is in modulation mode and a signal is input to the on off modulation socket the laser operates in both modes simultaneously When the on off input state is high the laser behaves as if it were in digital or analogue mode
34. ntrol Panel Hardware and Sound X y Search Control Panel Control Panel Home 7 Devices and Printers j I System and Security 3 Addadevice Add a printer Mouse Device Manager Network and Internet AutoPlay ici Change default settings for media or devices Play CDs or other media automatically La la Sound Adjust system volume Change system sounds Manage audio devices Programs User Accounts and Family Safety Appearance and Personalization Power Options Change battery settings Change what the power buttons do Require a password when the computer wakes Change when the computer sleeps Clock Language and Region Adjust screen brightness Ease of Access Display Make text and other items larger or smaller Adjust screen resolution Connectto a projector Connect to an external display an Windows Mobility Center Adjust commonly used mobility settings SmartAudio E 2 Under the Devices and Printers section choose Device Manager 3 Under Other devices find the device called Cobolt Laser Driver MLD DPL Right click it and chose Update Driver Software 4 5 39 Cobolt 06 01 Series y Device Manager File Action View Help 9 f O B mee NS a y Elgo gt Y Batteries p Mi Computer gt Disk drives gt ME Display adapters b c IDE ATA ATAPI controllers gt 2 Imaging devices b Keyboards b A Mice and other pointing devices
35. ontact your local Cobolt representative for an online re calibration If the laser does not function do not attempt to open any of the units or the warranty will be voided Call or e mail your local Cobolt representative for consultancy and to request an RMA number see back cover for contact information If an RMA number is issued and the laser needs to be shipped back to Cobolt or your local representative please pack the complete system for shipment using the original package or equivalent Ensure the unit is free from thermal paste before packing The warranty covers repair or replacing the unit at the option of Cobolt 5 Cobolt 06 01 Series 13 Declaration of Conformity CDRH modes only The CDRH model lasers 100 are designed and manufactured to comply with the EC Low Voltage Directive and the EC EMC Directive in the CDRH compliant configuration of Laser Head Control Box 1m VGA cable MLD or 1m Molex cable DPL and Cobolt supplied power supply All equipment must be mounted on a common ground plane such as an optical table The equipment might not conform to the EC directives if any part of the supplied equipment is replaced with a part not supplied by Cobolt or if the equipment is not properly grounded Disabling the key switch nullifies the CE marking as this violates the laser safety standard The following harmonized standards are in use Electrical Safety EN 61010 1 IEC 61010 1 UL 61010 1 Laser Safety Class IEC 608
36. publisher of the driver is unverified Choose Install this driver software anyway y Device Manager File Action View Help 9 FG HElEspess b la C p Ss D gt Don t install this driver software You should check your manufacturer s website for updated driver software for your device gt Install this driver software anyway Only install driver software obtained from your manufacturer s website or disc Unsigned software from other sources may harm your computer or steal information 7 The installation should now be complete 42 Cobolt 06 01 Series 7 5 Communication commands The laser is set in auto start mode when delivered see section 6 for auto start sequence description For system integration the Auto start sequence can be disabled some commands require Auto start disabled All arguments are in lower case and separated by a space ASCII 32 For re starting the laser with commands after having opened the remote interlock switch execute cf for clear fault followed by cob1 to restart the laser On CDRH models the key switch is the only way to re start The following command can be used with all 06 01 Series lasers Command Function Argument Returned value Get laser ON OFF state O OFF 1 ON cob 1 Restart laser Forces the laser on without checking if autostart is enabled hrs Get Laser Head operating hours Float ilk Get interlock state 0 OK 1 interlock open cobas Enable
37. ratures section displays the temperature of the Laser Head s base plate along with the fault status for the laser s internal thermoelectric cooler TEC The LEDs section displays the LEDs that are currently illuminated on the Control Box These are displayed even if the laser is in OEM mode POWER Green Power is supplied ON Orange Laser emission is on This light is always on in modulation mode if laser emission is possible ERROR Red An error has occurred The Autostart section displays whether Autostart is enabled and if the laser is in CDRH or OEM mode This section also displays the current laser status There are buttons to abort the autostart sequence or restart the laser Under the Operation section the user can switch between modulation mode constant power mode and constant current mode The box to the right of the Modulation Mode check box allows the user to set the peak power in digital or on off modulation mode Likewise there are boxes to set the constant power level and constant current level The output power as monitored measured on an internal photodiode and the current through the laser diode are both displayed The user is also given the ability to calibrate the internal power monitor using the Power Cal box To use this measure the power externally and enter the value into this box 46 Cobolt 06 01 Series 5 The Modulation Type section allows the user to select which type of modulation is used when the la
38. returned there may be a problem with the constant power system Contact Cobolt technical support 50 Cobolt 06 01 Series 11 Warranty and maintenance The Cobolt lasers should not be opened for any reason The warranty will be void if any of the system units are opened All laser parameters are set at the factory and there are no adjustments required other than those described in this manual for operating in different modulation modes and at different power levels 11 1 MLD Cobolt provides a system warranty of 12 months after delivery with unlimited hours of operation expect on 638nm and 660nm MLD which has a 12 month warranty or 5000 hour limited warranty whichever comes first The laser systems are designed for modular replacement or repair in the event that the Laser Head or Control Box malfunctions Warranty is invalid if the laser system is operated outside of the specific limits and conditions as outlined in this document 11 2 DPL Cobolt provides a system warranty of 12 months after delivery with unlimited hours of operation Warranty is invalid if the laser system is operated outside of the specific limits and conditions as outlined in this document 12 Service Due to accuracy tolerances calibration differences and allowed power drift there may be discrepancies between the Cobolt measurement of the optical output power and the customer measurement equipment If the output power deviates from the reported value please c
39. ries 10 Troubleshooting Below are some possible problems along with a list of things to check if the problem occurs No laser emission after 3 minutes from start up Verify the interlock is connected and restart the laser Verify that autostart is enabled Click the restart button in the Monitor software or send the command cob1 to force a restart of the laser Ensure the laser has adequate heat sinking Verify the supply voltage is within the range stated in section 3 6 MLD Only Check the base plate temperature this is displayed in the Cobolt Monitor software If it is outside of the range 20 50 C the laser may take longer to stabilize the temperature or be unable to do SO MLD Only Remove any connector from the ON OFF MOD socket on the Control Box or pin 6 on the Laser Head s D SUB in OEM mode Make sure the laser is not in modulation mode in the software or with the cp command then restart the laser Send the command f If fault code 1 is returned check that the heat sink is adequate and that the ambient temperature is under 40 C If fault code 3 is returned see interlock fault checklist If fault code 4 is returned there may be a problem with the constant power system Contact Cobolt technical support Interlock fault If using a custom interlock system connect the Cobolt supplied interlock plug to check whether the interlock is correctly wired This interlock should be connected as describ
40. rs on off modulation mode the laser will operate in both simultaneously See below for more information about modulation mode combinations Cobolt Monitor for MLD 3 0 0 17 yo 3 File Tools Help Temperatures Base Plate Basepiate G Cobolt Temperature On off mod active re Visuiation Type Analog Impedance LEDs Autostart Digita 50 Ohm Power On O Analog o 1kOhm LaserOn Digital Analog Error o Set peak power OEM Mode Operas 100 0 mW V On Off Modulation 100 0 mw ar EZ mW On Off Modulation 80 0 mA Current 94 0 mA Power Cal mW Laser Off Fault Mone Abort Cobolt Monitor MLD software when the laser is operating in on off modulation mode The on off modulation feature should never be used as an interlock An interlock socket is provided for this purpose on the laser head 34 Cobolt 06 01 Series Digital modulation Digital modulation is the fastest modulation mode possible with the MLD laser it has the largest bandwidth and shortest rise time Digital modulation requires a 0 5V TTL input signal applied to the digital modulation input female SMA connector on the Laser Head and the duty cycle is set by the input signal The diode current is modulated in a square wave To enter digital modulation mode using the Cobolt Monitor MLD software select Modulation Mode under Operation and Digital under Modulation Type Using the box to the right of the Modulation Mode check box yo
41. s To start the laser turn the key on the Control Box clockwise to the ON position If it is already in the ON position turn it to OFF and then ON again Light will be emitted as soon as the key is turned Cobolt 06 01 Series The laser will now start up in continuous wave mode at its nominal maximum power level 4 1 2 Modulation quick start There are three ways of modulating the laser digital analogue and on off modulation the simplest of which is the on off modulation feature which requires no data connection to the laser Here is a quick guide to getting on off modulation up and running For a detailed guide to operating the laser in modulation modes see section 6 3 1 Set your signal generator to give a square wave with an amplitude of 5V peak to peak 2 Connect the input from the signal generator to the socket labelled ON OFF MOD on the Control Box via a 3 5 mm stereo plug section 6 3 contains details on wiring the plug 3 When the system is connected to a signal generator it will automatically enter on off modulation mode When an input signal is received the laser will begin modulating 5 V on 0 V off The peak power is set by default to the laser s nominal maximum power 4 To return to continuous wave mode disconnect the connector from the ON OFF MOD socket then restart the laser by turning the key off and on again 4 2 DPL 4 1 1 Continuous wave quick start 1 Mount the laser on a heat
42. s wave mode only The Cobolt lasers are intended for stand alone use in laboratory environment or for integration into instrumentation equipment used e g in flow cytometry fluorescence microscopy particle amp flow analysis DNA sequencing interferometry and Raman spectroscopy Cobolt 06 01 Series 2 Safety 2 1 General All Cobolt 06 01 Series lasers including all Cobolt MLD and Cobolt DPL models are Class IIIB CDRH Class 3B IEC laser products that emit less than 500 mW of laser radiation within the visible spectrum Eye and skin exposure to direct or reflected laser light is hazardous and may be extremely harmful Always wear eye protection appropriate to the beam wavelength and intensity The device must be handled by skilled personnel with experience of lasers in a laboratory environment and with access to adequate laser safety equipment The Laser Head clearly displays a yellow warning label that shows the location of the laser beam aperture This label must be visible unless the laser beam is totally enclosed The table below described the irradiance in W cm2 and appropriate level of eye protection in terms of optical density OD for each product line Product Nominal Output Power mW Irradiance W cm2 Eye protection Requirement Cobolt MLD 405 nm 250 97 gt OD 4 Cobolt MLD 445 nm 80 31 gt OD 4 Cobolt MLD 473 nm 100 39 gt OD 3 Cobolt MLD 488 nm 200 78 gt OD 4 Cobolt MLD 515 nm 6
43. ser is in the modulation operation mode Note that on off modulation is not a choice here because on off modulation operates simultaneously with whatever mode was previously selected 6 The Analogue Impedance section allows the user to set the internal impedance value to match that of the signal generator 7 Under General there is a Clear Fault button This can be used to restart the laser after the interlock has been removed and re inserted There is also a Refresh button that is used to update the display in the GUI after issuing manual commands 8 2 Cobolt Monitor for DPL 4 X X X 8 2 1 Installation Cobolt Monitor 4 X X X is a stand alone executable and can be run from any storage device To obtain the software download it from www cobolt se Microsoft NET is common on most modern windows PC s but if necessary it can be downloaded here http www microsoft com net downloads 1 Extract the archive to the desired storage device 2 Open CoboltMonitor06 81 exe 8 2 2 Software instructions With the laser connected and powered select Options from the Tools menu The Port name drop down box shows a list of available COM ports Select the port which the laser is connected to and click OK The laser is connected via USB and it usually has the highest COM port number Com Port Settings Serial Port Port Name COM3 Baud Rate 115200 To connect to the laser choose Connect from t
44. the noise is equal The specification parameters are not guaranteed over time periods of greater than 8hrs for constant power mode The constant power and constant current set points can be changed using the Cobolt Monitor MLD software calibrate function or via RS 232 commands The constant power monitor loop can also be calibrated using the software Before running the laser in constant power mode over short periods lt 8hrs re calibrate the power When running the laser over longer periods in constant current mode it is recommended to re calibrate at regular intervals 6 2 2 DPL The laser can only operate in continuous wave mode There are two operating modes constant power and constant current The default mode for Cobolt DPL lasers when shipped is constant power In constant power mode the power is monitored on an internal photodiode and this is used to regulate the current to maintain a constant power level In constant current mode the laser runs at a set current level It is recommended to operate in constant power mode since the power is more stable over long periods and the noise is lower The specification parameters are not guaranteed for constant current mode 32 Cobolt 06 01 Series 6 3 Modulation 6 3 1 MLD Which modulation type to use The Cobolt MLD has three different modulation methods on off digital and analogue These three modes aim to cover most applications the user may have and they each have very diff
45. tus When power is supplied to the Laser Head regardless of on off or key switch state the temperature control elements will be active to reach set point values The status of the laser operation is given via LED indicators ON Green Laser emission is on ERROR Red An error has occurred Cobolt 06 01 Series 3 5 Thermal management To ensure operation within given specifications and for the warranty to be valid the Laser Head must be attached to a heat sink This value is the difference between the maximum allowed Laser Head base plate temperature 50 C and the maximum specified ambient temperature at the air heatsink interface 40 C divided by the maximum power dissipated from the laser 12W for MLD 20W for DPL The mounting surface should be flat within 0 05 mm over mounting surface Under normal circumstances thermal heat compound is not required however if the laser is operated in an area with a high ambient temperature it is recommended to use a compound between the Laser Head and the heat sink to provide good thermal contact For assistance in thermal management and system integration please contact Cobolt s technical support 3 5 1 MLD The MLD Laser Head must be attached to a heat sink providing a thermal resistance of lt 0 8 K W Heat Sink Requirements MLD Thermal Impedance K W o o 10 20 30 40 50 Ambient Temperature C Figure 2 4 1 Heat Sink Requirements for MLD 3 3 2 DPL The DPL Laser Head
46. u can set the peak power level that the laser will modulate up to This is set in the factory to the laser s nominal maximum power level Analogue modulation Analogue modulation allows direct control of the laser power by an input signal This allows the laser to be modulated with arbitrary pulse shapes at limited bandwidth To enter analogue modulation mode using the Cobolt Monitor MLD software select Modulation Mode under Operation and Analogue under Modulation Type The input signal should be connected to the Analogue BNC connector on the Control Box CDRH model or the dedicated pins on the 15 pin D SUB OEM model The laser is calibrated so that a 1 V input gives 100 of the laser s nominal power level for modulation frequencies from DC 300 kHz a higher voltage may be required to modulate at higher frequencies see below Note that the laser may give more power if a voltage larger than 1 V is used Although the current is clamped to a safe current limit to prevent damage the user must nevertheless avoid overdriving the diode so that it gives more than the nominal power level specifications and diode lifetime are not guaranteed above the power which is stated on the silver sticker on the Laser Head It is highly recommended that the user measures the input voltage over the Laser Head when setting up analogue modulation When the laser is modulated from 0 to 1 V the current through the laser diode is modulated from slight
47. xternal switch connect a pin 1 and 2 on a Molex plug In the CDRH configuration the DPL is provided with a 3 5mm mono plug In order to control the interlock remotely a 3 5mm stereo plug is required The ring and sleeve see figure must be connected for the laser to operate Pin l Pin y Pin 5 Interlock connector Pin 2 Pin 4 Pin After the interlock has been opened the laser will need to be reset before it can be used again The signal level is between OV and 5V with a pull up resistor R225 R224 and the current required to ground the interlock is 5 mA The time delay in the hardware is lt 1ms but after filtering by the firmware the reaction time is extended to lt 20ms A diagram of the interlock electronics is shown below 5V 3V3 D222 l BAV99W SOT323 MOLEX alp DI 3k9 I y INTERLOCK Tol R227 221 10k 100n 5 4 Direct ON OFF Control DPL Only Direct On Off function as described here is only available with DPL modes For a similar function in MLD models see section 6 3 Modulation for information on ON OFF modulation The Direct On Off Control feature enables turning the laser ON OFF using a 5 12 VDC signal After having configured the Controller for Direct Control operation factory set or by executing cobasdr 1 the laser can only start up when 5 12V VDC max 12 5 VDC is applied to pin 3 on the Molex connector with 0 VDC on pin 2 as reference Shifting the signal
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