USER`S MANUAL DPSS LASER TITAN SERIES
Contents
1. DPSS Lasers USER S MANUAL DPSS LASER TITAN SERIES Covers Models Txx yy and CW User Manual TITAN Series 2 THIS PAGE LEFT INTENTIONALLY BLANK 780 026 Rev B 2 of 31 DPSS Lasers Inc User Manual TITAN Series TABLE OF CONTENTS Safety and Compliance Warranty Information Product Specifications Laser Head 1 0 85 System Installation Incoming Inspection Installation Tools Unpacking Ventilation eee eee eene nnne MOunting _ __ __________ __ _ __ _ Power _____ Connecting the Cooling System Connecting the Laser Cables System Controls Power Supply Controls LCD Messages and ____ Turning On the Laser System for the First Time Daily Operation of the Laser System Turn On Procedure Remote RS 232 Connection _______ Laser Command Language TTL Remote Connection Storing Your Laser Troubleshooting s ssssese Troubleshooting Guide LCD Error Messages Appendix I Common Laser Beam Terms Appendix II DPSS Laser Appendix III Controlling the Laser Remotely2. Appendix IV Rep Rate vs Power Pulse Width Support Corporate Offices 222222222 Worldwide Distributors 2 Customer Service Laser Test Data Included Separately BANDANA A amp Pulse Energy 780 026 Rev B 3 of 31 DPSS Lasers Inc User Manual TITAN Series 4 SAFETY AND COMPLIANCE Before operating this equipment users should refer to ANSI Standard Z136 1 that outlines precautions for safe operation of laser equipment and specifically recommends that Users should have initial eye examinations prior to operating laser equipment followed by periodic re examinations 2 Users should use appropriate eye protection when operating laser equipment The standard is available from the Laser Institute of America LIA telephone number 407 380 1553 This equipment is powered by a high voltage power supply capable of high current output There are no user serviceable components in this system This laser complies with FDA radiation performance standards 21 CFR subchapter J a WARNING HAZARDOUS LASER RADIATION AVOID DIRECT EXPOSURE TO THE BEAM DO NOT STARE AT SCATTERED OR REFLECTED LIGHT STRICT OBSERVANCE OF THE FOLLOWING WARNING LABELS IS ADVISED DANGER VISIBLE AND INVISIBLE LASER RADIATION AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION 355 nm BW 400 uJ SERSA EUNSCRERTETURNEE This label is affixed to the laser head cover next to the laser
3. Turn off the Cooling system I TIP In order to minimize the time required for the laser to warm up from a cold start to stable operation the cooling system can be left continuously on to maintain the laser at a stable temperature Note To extinguish the pulsed output beam for short periods of time minutes hours the system can be set to the CW mode by pressing the Q SW button The system can later be returned to the pulsed output state by again pressing the Q SW button and entering the ENABLE mode 780 026 Rev 16of 31 DPSS Lasers Inc User Manual TITAN Series 17 Note extinguish pulsed output beam for long periods of time several days laser can either be switched off or set to the STANDBY mode by pressing the STBY button To restart the laser follow the turn on procedure above y Note At any time complete laser extinction can be achieved either by pressing the STBY button switching the key switch to the OFF position or unplugging line cord Additionally any fault detected by the system will immediately extinguish all laser radiation REMOTE OPERATION The 3500 DPSS laser with Smart PS can be controlled remotely via either a TTL connection or RS 232 interface The system is equipped with a connector dedicated to each of these functions at the rear of the power supply labeled REMOTE and RS 232 respectively see Appendix for more details RS 232 CONNECTION FIGURE 4 RF OUT
4. key switch Enables power to all electronic control systems Toggles between CW mode and Internal Rep Rate mode Flashes during warm up steady afterwards ON when internal q switch frequency is active Laser ON button Turns laser diode ON Decreases selected parameter POWER ON FAULT oN TIP With the exception of the remote the front panel input buttons override all other commands 780 026 Rev B 13 of 31 DPSS Lasers Inc User Manual TITAN Series 14 LCD MESSAGES AND FORMAT The LCD displays the laser status as well as error messages and menu items The display jumps to the relevant menu item when a command is input via the state buttons on the front panel or a command is issued via RS 232 The possible menu items and the format of the display are illustrated below DIODE CURRENT MENU Item SET value SENSE value SERIAL DIODE TEMPERATURE SOFTWARE VERSION 9 DIODE HOURS m TIP Pressing the UP or YVO4 TEMPERATURE DOWN arrow buttons while holding the MENU button allows you move forward and backward through the menus Holding the MENU SHG TEMPERATURE Q SWITCH FREQENCY button for 30 seconds stores all the current laser parameters to memory These are now the new laser operating parameters THG TEMPERATURE SCAN HIGH LIMIT SCAN LOW LIMIT 14 of 31 DPSS Lasers Inc 780 026 Rev B User Manual TITAN Series I3 TURNING ON THE LASER SY
5. DPSS Lasers Inc SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE OR KIND WITH RESPECT TO ANY PRODUCTS OR SERVICES SOLD OR RENDERED HEREUNDER AND UNDER NO CIRCUMSTANCES WILL DPSS Lasers Inc s LIABILITY EXCEED THE COST OF REPAIR OR REPLACEMENT OF THE DEFECTIVE ITEM OF EQUIPMENT DPSS Lasers Inc NEITHER ASSUMES NOR HAS AUTHORIZED ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY 780 026 Rev B 5 of 31 DPSS Lasers Inc User Manual TITAN Series PRODUCT DESCRIPTION The Titan Series DPSS laser US patent 6 002 695 15 a high repetition rate Q switched Diode pumped Nd Vanadate system employing intra cavity doubling and tripling for efficient ultra violet generation With specified average powers of one tenth watt 0 1 W to three watts 5 0W at 355nm and at repetition rates from 30 kHz to 300 kHz the DPSS laser is specifically designed to meet the needs of the OEM system designer Combining the power conversion efficiency of diode pumped solid state technology with proprietary laser cavity design and a sealed housing the Titan Series is ideally suited to industrial environments The laser requires only regular household electrical power no external water cooling and operates at or near room temperature Thermoelectric coolers transfer heat to the cast aluminum base while a closed cycle cooling system transfers the heat to the room air A proprietary mechanical design utilizing stress relieved components el
6. path for contamination or damage Turn off laser system and clean laser output window according to cleaning instruction in Service Appendix If necessary an aperture or filter can be placed one foot away from the laser head to block this green emission Verify signals going to remote connector Check for proper button operation LOCAL FAULT Chiller not turned on Flow switch not connected J4 or J5 not connected or reversed DIODE OVER CURRENT Diode current limit set too low DIODE TEMPERATURE FAULT Chiller not regulating Bad or broken cable or pin 14 15 14 15 14 15 If the problem cannot resolved using troubleshooting guide above please contact a DPSS Lasers Inc Customer Service Representative at either your local distributor or directly through the DPSS Lasers Inc Customer Service Department For contact information refer to the Support page of this manual 780 026 Rev 24 of 31 DPSS Lasers Inc User Manual TITAN Series 25 APPENDIX I COMMON LASER TERMS The following is a list of the parameters that characterize the laser beam emitted from a DPSS laser Wavelength Electromagnetic energy is transmitted in the form of a sinusoidal wave The wavelength is the physical distance covered by one cycle of this wave it is inversely proportional to frequency In the case of the DPSS laser the wavelength 15 expressed in nanometers Repetition Rate Defined as the number of optical
7. pulses emitted from the laser per second Pulse Length The interval duration of each pulse from the laser The pulse length 15 the measured length in time at half of the maximum amplitude of the pulse FWHM Average Power The product of the energy per pulse joule and the repetition rate pulse frequency in Hertz expressed in Watts Spatial Profile In the case of the DPSS laser the output beam 15 close to Gaussian or TEMoo in shape The beam is circular in cross section and the amplitude 15 E 0 exp r w where r is the distance from the beam center and w is the radius at which the amplitude is 1 of its value on the axis w is called the beam width Sometimes the Spatial Profile of the laser is referred to as the Mode of the laser Beam Diameter As the beam in the DPSS laser is approximately TEMoo the beam diameter is defined as the calculated distance between two exactly opposed points on the beam where the energy has dropped to 1 e 2 of its peak center energy It can also be viewed as the diameter of a circular aperture through which 8646 of the total energy of the beam will pass Divergence The change in beam diameter with distance of an initially collimated beam It is expressed as an angle in milliradians mrad Polarization The direction of the electric field vector in the laser beam The polarization vector is always in the plane at right angles to the direction of the beam In the case of
8. INTRLCK REMOTE INPUT 100 240w 10 50 60 Hz The laser can be controlled remotely over an RS 232 serial communications interface see Figure 4 The nature of the serial connection and the communications taking place over it are described below Parameters DCE no handshaking Baud Rate 9600 Data bits 8 Parity none Stop Bits 1 Flow Control none Other Signal Connections RTS and CTS The pin configuration is DB9 at both ends of the connection with a straight through cable as shown 780 026 Rev B 17 of 31 DPSS Lasers Inc User Manual TITAN Series 18 LASER POWER HOST COMPUTER SUPPLY DB9 DB9 LASER COMMAND LANGUAGE Instructions to the laser consist of a string of ASCII characters followed by a carriage return or by a carriage return line feed The line feed is optional If a line feed is sent after the carriage return it is ignored The laser will allow either all Upper Case or all Lower Case characters It will not allow Mixed Case characters to be entered Instructions fall into two categories Commands and Queries Commands are executed by the laser which acknowledges completion of the command by transmitting a lt CR gt lt LF gt For queries the laser returns the requested information in ASCII string form terminated by lt CR gt lt LF gt y Note Both commands and queries signal completion by transmitting the lt CR gt lt LF gt Any characters transmit
9. L R88 2N3804 10K uh Table 3 describes the individual pin functions of the TTL remote Refer to the schematic above for further detail TABLE 3 TTL REMOTE DESCRIPTION ____ O ____ 220 LASERON INPUT LEVEL LO TO ENERGIZE LASER DIODE USE WITH PIN 8 FAULT OUTPUT ACTIVE LEVEL HI WHEN FAULT IS DETECTED 4 NA inse EXTERNAL FREQUENCY INPUT 30KHz 300KHz 50 DUTY 7 Q SWITCH INPUT CYCLE LET per DETECT INPUT ACTIVE LEVEL LO TO ENABLE USE OF PIN 2 jm SIGNAL PWR REF SIGNAL GROUND uja ___ _ __ O __13 NA 14 GND EARTH EARTH GROUND Minimum duty cycle at the Ext frequency input PIN 7 is 1090 For greatest stability 5090 duty cycle 15 recommended Laser pulse width is not derived from the Ext frequency input This 15 controlled internally As the frequency 15 lowered energy per pulse will increase until a maximum energy is reached at 30 KHz The system will accept lower pulse frequencies down to a single pulse but the maximum energy per pulse is limited to a 30 KHz pulse See Appendix IV Single pulses can be generated at all repetition rates by introducing a train of two pulses at the desired energy frequency the first pulse is suppressed and the second pulse produces an optical pulse of the desired energy 780 026 Rev 20 of 31 DPSS Lasers Inc 30 User Manual TITAN Serie
10. SS Lasers com WEB www DPSS Lasers com WORLDWIDE DISTRIBUTORS WEB www DPSS Lasers com distributors htm CUSTOMER SERVICE TEL 408 988 4300 EMAIL Techsupport DPSS Lasers com 780 026 Rev loft 31 DPSS Lasers Inc
11. STEM FOR THE FIRST TIME Refer to Figure 3 A WARNING Install a power meter or beam block in front of the output of the laser before turning on the laser Place the power meter or beam block a few inches from the laser output aperture to avoid contaminating the output window with ablated material A WARNING lf the laser beam strikes any semi glossy or reflective surfaces dangerous and potentially blinding reflections or scatter can result Never work around the laser or enter a room where the laser is operating without wearing laser safety glasses Turn on the Cooling system Verify that the water in the reservoir is bubbling vigorously and fill the reservoir as necessary Allow the system to run for two minutes to ensure that all air has been purged from the hoses Verify that the manifold temp on the cooling system display is moving toward 18 0 C set temperature Check the system for any water leaks 47 Note The Cooling system temperature is factory set to 18 0 No further adjustment of set temperature is recommended or required Check water level and top off every 2 3 months If provided turn on the master power switch at the rear of the power supply The large green power indicator LED at the front on the power supply should be illuminated Turn the key switch to the ON position Make sure the power switch on the cooling system is in the ON position and note that the cooling system turns on and the water in th
12. SULT IN HAZARDOUS RADIATION EXPOSURE 47 Note DO NOT remove covers or panels unless specified VENTILATION Provide adequate ventilation such that the ambient temperature of the air is in the range of 20 30 This is preferred operating temperature range for the laser The lasers will operate satisfactorily over a greater range 10 35 C but derated power may be experienced It is important that air inlets on the back and sides of the laser power 780 026 Rev B 8 of 31 DPSS Lasers Inc User Manual TITAN Series 9 supply and cooling unit are not obstructed and that the exhausted hot air is not allowed to recirculate into the air inlets MOUNTING The laser head is designed to be mounted in any orientation For testing purposes the laser can simply stand on a table on its feet For permanent installation the laser should be mounted to the user s system or optical bench The dimensions of the mounting feet are shown in the outline drawings in the Product Description chapter see Figure 1 The mounting feet are designed to provide mechanical isolation between the laser resonator structure and the mounting surface This feature prevents any lack of flatness of the mounting surface bending of the surface or differential thermal expansion from affecting the laser mirror alignment When all three feet are rigidly attached to the mounting surface the laser will not move Do not attempt to mount the laser by the base itsel
13. With the key switch in the OFF position 0 connect the AC power cable into the rear of the power supply and then into a suitable AC power outlet 780 026 Rev 11 of 31 DPSS Lasers Inc User Manual TITAN Series I2 SYSTEM CONTROLS GENERAL DESCRIPTION Before attempting to operate the laser familiarize yourself with its various controls The power supply PS consists of five control loops Diode current Diode temperature Vanadate temperature Doubler temperature and Tripler temperature and control functions for user interfacing The PS receives user input from the front panel via 6 buttons as well as input via a hardware remote and RS 232 These inputs will determine the state of the laser system There are three laser states STAND BY Laser emits no light q switched lasers laser emits low level CW light For CW lasers laser emits CW light at specified power Q SWITCHED Laser emits high power q switch light at specified power v Note The Q SWITCHED state and its relevant settings are not used in the Titan Infinity CW laser system 780 026 Rev B 12 of 31 DPSS Lasers Inc User Manual TITAN Series 13 POWER SUPPLY CONTROLS Refer to FIGURE 3 and TABLE 1 FIGURE 3 READY ENABLE MENU EMISSION p TABLE 1 DESCRIPTION FUNCTION 9 7 NN 20 char x 2 lines Displays messages and menu items POWER ON GrenLED LED ON when AC line voltage is connected
14. about 40 nanoseconds long 0 000000040 seconds Once the energy is depleted from the Vanadate the Q switch is closed and the gain 15 allowed to build up in the Vanadate for the next pulse The rate at which the Q switch opens and closes determines the repetition rate of the laser For the DPSS laser this is typically 30 kilo Hertz 30 000 pulses second Although the near infrared 1064nm light is useful for some applications it 15 often preferable to convert this light to shorter wavelengths using harmonic conversion In the case of the DPSS laser crystals are placed within the resonator to combine photons of light to produce different wavelengths The first process 1s to convert some of the 1064nm infrared light into 532nm green light using a crystal commonly known as a doubler Note that two times 532nm is 1064nm In essence the doubler crystal combines two photons of 1064nm to form one photon of 532nm light Exiting the crystal are two superimposed beams one at 1064nm and one at 532nm These two beams enter a second crystal in the cavity called a tripler and through a similar process a photon of residual 1064nm and a photon of 532nm light are combined to form a new photon of 355nm light The three beams residual 1064nm residual 532nm and useful 355nm exit the tripler crystal superimposed A prism is used to physically separate the beams and 355nm beam is directed to the output port of the laser with a pair of mirrors The 532n
15. ature Set Point of device n in C Format XX XX C n 1 Laser Crystal n 2 Doubler Crystal n 3 Tripler Crystal n 4 Diode Fault Buss Status Faults 1 message Fault Firmware revision number Format Figure 5 RF OUT REMOTE AC INPUT 100 240 10 50 60 Hz The connector on power supply labeled REMOTE can be used to externally control laser through TTL level signals see Figure 5 The following is a description of the functions of the pins on the REMOTE connector Refer to Appendix III for schematic and more information on this topic Pin 1 NA Pin 2 LASER ON This is an input pin and is normally HI at 5V and can be pulled LO grounded to start the laser and energize the laser diode This takes the system from the STANDBY mode to the WARM 780 026 Rev B 20 of 31 DPSS Lasers Inc User Manual TITAN Series 21 3 4 5 6 7 8 9 10 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 UP countdown sequence READY LED blinking then illuminated This pin must be used in conjunction with PIN 8 FAULT This is an output pin and is normally LO When fault is indicated this pin will be set HI to 5V and remain HI until the fault has been reset by pressing the STBY button or the system power has been cycled When a fault 15 indicated all internal current drive and loop control is termi
16. ducing train of two pulses at the desired energy frequency the first pulse is suppressed and the second pulse produces an optical pulse of the desired energy 780 026 Rev 2l oft 31 DPSS Lasers Inc KO User Manual TITAN Series STORING YOUR LASER DPSS Lasers Inc has designed the Titan Series DPSS laser for maximum reliability and flexibility However if you plan to store your laser for an extended period of time there are a few steps that you can take to ensure that your laser will always turn on at peak operating performance Unplug the system Disconnect the cables between the laser head and power supply Disconnect the hoses and drain the water from the laser head Wrap the units in their plastic bags and pack them in their original shipping container Store the system in a cool dry place preferably free from dirt and contamination Following the above procedure will insure outstanding performance from your laser even after long periods of storage If you have any questions regarding this procedure or the care of your laser during prolonged storage please call DPSS Lasers Inc Customer Service TROUBLESHOOTING The information in this section is intended to be used as an aid to the user in assessing problems with the operation of the laser and as a guide to assist experienced users in resolving routine problems If there is any question about the procedures contained in this section or associated hazards cal
17. e reservoir begins circulating The INTLK LED will flash for 15 seconds during boot up and then extinguish If the INTLK LED remains illuminated after 15 seconds refer to the troubleshooting section of this manual for instructions Press the STANDBY button at the front of the power supply to clear any initial faults If the FAULT LED remains Illuminated refer to the troubleshooting section of this manual for instructions The laser system is now ready for operation To turn on the laser press the ON button The EMISSION LED will illuminate the READY LED will flash for 90 seconds and then remain illuminated This indicates that the laser system is ready to output radiation y Note Although the laser is capable of emitting radiation after 90 seconds the internal components may take some time to reach optimum performance generally 20 minutes to reach 80 power and 60 minutes to reach 100 power Itis normal for the output beam to appear and disappear several times within the first 20 minutes For q switched lasers to initiate pulsed laser operation press the Q SW button The ENABLE LED will illuminate and the LCD will display the internal repetition rate at which the laser is q switching i TIP Remember to open the laser shutter to allow the beam to exit the laser aperture 780 026 Rev 15 of 31 DPSS Lasers Inc User Manual TITAN Series 16 v Note Under normal conditions CW UV radiation will be emitted fr
18. emission indicator This laser has a maximum output of 8W at 355nm This label 15 displayed on the side of the laser head e 2525 WALSH AVENUE DPSS Lasers SANTA CLARA CA 95051 SERIAL NO MODEL MANUFACTURED IN USA THIS LASER COMPLIES WITH FDA RADIATION PERFORMANCE STANDARD 21 CFR SUBCHAPTER J This label is affixed to the back of the power supply This Serial Number Model Number label is located on the back of the laser head power supply and cooling system This label is affixed next to the laser output port shutter 780 026 Rev B 4of 31 DPSS Lasers Inc User Manual TITAN Series 5 LIMITED WARRANTY mechanical electrical and optical parts and assemblies when operated under normal conditions and in accordance with the product instructions are warranted to be free from defects in workmanship and materials for the first full year following delivery of the equipment The following warranty conditions shall apply to all laser systems unless amended in writing by DPSS Lasers Inc ADJUSTMENT No electrical mechanical or optical adjustments to the laser system are permitted unless expressly authorized by DPSS Lasers Inc PARTS AND LABOR New or factory built replacements for defective parts will be supplied for one 1 year from date of delivery of the equipment Replacement parts are warranted for the remaining portion of the original warranty period There will be no charge for repair of products u
19. f or some manner other than with the feet or other DPSS Lasers Inc approved mounting device POWER REQUIREMENTS The laser power supply and cooling system are universal input devices They will operate at any standard AC line voltage worldwide 90 240 VAC AII models operate at 50Hz or 60Hz input 780 026 Rev 9 of 31 DPSS Lasers Inc User Manual TITAN Series 10 FIGURE 2 SIIPPLY EERE S VIET LASEE FLOA 18 ITPH 24LL IH TEE LOCKE HEAD n ES A CHILLEE SILE IET E n e 3 24 p ES FEEFETTLI oe HHHH nes Fc e a SUFELY FLOA LC ALLL DLTLET 780 026 10 of 31 DPSS Lasers Inc User Manual TITAN Series 11 CONNECTING THE COOLING SYSTEM Refer to FIGURE 2 The laser system is supplied with two water hoses A flow sensor is attached to one hose at the male end SUPPLY Connect this end of the hose to the female port on the laser head Connect the other end of this hose SUPPLY to the port on the cooling system marked with an arrow pointing down Connect the second hose RETURN to the remaining male port at the laser head Connect the other end to the remaining port on the cooling system marked with an arrow pointing up Remove plastic filler cap for the water reservoir on the cooling sys
20. igorous bubbling action of water Verify that laser baseplate is at or near room temperature Verify that the power supply chassis is at or near room temperature Ensure that there is adequate ventilation for the Cooling system and the power supply Open shutter on laser head If REMOTE is being used verify signals to remote connector Verify that RF BNC cable is connected at power supply and laser head Verify that shutter is fully open Verify that ambient temperature is within acceptable operating limits Verify that Cooling system 15 maintaining set temperature Allow laser to warm up for one hour prior to use DPSS Lasers Inc User Manual TITAN Series Power oscillation after several hours of operation Poor beam quality Scattered green emission with UV output Strong UV emission when q switch is DISABLE LCD ERROR MESSAGES 24 Ambient temperature changing dramatically Cables J4 or J5 not seated well Cooling system malfunction Contaminated or damaged optics external to the laser head Contamination or damage to laser output window It is normal for some green light to be emitted with the UV output REMOTE is being used Q SW button stuck on front panel Verify that ambient temperature remains within acceptable operating limits Verify that cables J4 and J5 are well connected at power supply and laser head Verify that Cooling system 15 maintaining set temperature Check optics in optical
21. iminates cavity alignment for the life of the laser The laser output 15 horizontally polarized and the mode is TEMoo The Titan Series DPSS laser has been designed for materials working applications including metals organics and inorganics Specific applications include micromachining ablating of various metallic and non metallic materials polymerization of photopolymers micro hole drilling marking and bio fluorescence STANDARD SPECIFICATIONS TITAN SERIES DPSS LASER Nd YVOA Frequency Tripled Q switched Laser OPTICAL variations based on model number Wavelength 354 7 nm Average power 0 1 5 0 W Pulse length 20 100 nsec Repetition rate factory set 30 300 kHz Mode lt 1 30 Beam diameter 1 2 0 mm Beam divergence full angle 0 3 mrad Polarization linear vertical gt 100 1 Beam pointing stability at constant temp 50 urad Power stability over eight hours First pulse suppression Yes ELECTRICAL Input voltage 90 240 50 60Hz VAC e Power consumption max 900 W e Ambient operating temperature non condensing 10 35 C PHYSICAL e Laser head dimensions in inches LWH 52 1 x 25 4 x 12 9 cm Laser head weight Laser power supply dimensions in inches LWH Laser power supply weight Cooling system dimensions in inches LWH Cooling system weight 780 026 Rev B 6 of 31 15 9 kg 33 0 x 45 5 x 13 7 cm 10 5 kg 28 7 x 22 4 x 38 9 cm EM kg DPSS Lasers Inc User Ma
22. l DPSS Lasers Inc Customer Service WARNING These procedures could result in exposure to hazardous laser radiation bright light sources Procedures should be performed only by persons who are familiar with the hazards involved and with the use of appropriate safety equipment A WARNING Do not remove any covers from the laser unless specified 1 Unauthorized removal of covers from the laser will void all warranties 2 There are no user serviceable components within the laser head or power supply 3 Inexperienced handling of the components in the laser can cause severe damage TROUBLESHOOTING GUIDE PROBLEM POSSIBLE CAUSES SOLUTION Power ON light not e Line cord not connected e Connect line cord to power illuminated e power switch at rear supply and suitable AC power of power supply not on if source equipped Turn on main power switch at rear of power supply Fault light ON at first turn on e Interlock open e Check all user installed interlocks 780 026 Rev B 22 of 31 DPSS Lasers Inc User Manual TITAN Series and cannot be reset Fault light ON after laser is operating No pulsed laser output after 5 minutes assumes no faults detected and system running with laser READY and q switch ENABLE Low output power after one hour warm up Power oscillation shortly after turn on 780 026 Rev 23 J4 JS cables in wrong positions at power supply or laser head Cooling system not t
23. m beam 15 dumped and the 1064nm beam stays within the resonator to form the laser cavity Finally the 355nm output beam may be optically manipulated with lenses and prisms to give the correct beam shape and size for the application 780 026 Rev 26 of 31 DPSS Lasers Inc 27 User Manual TITAN Series FIGURE 6 An 4 5 indino Ajquiessy LT MOPUIM jquiessy DHL pue DHS DPSS Lasers Inc 27 31 780 026 User Manual TITAN Series 26 APPENDIX Ill CONTROLLING THE LASER REMOTELY Depending on the specific needs of your application remote control of your laser system can be achieved by either RS 232 communication or TTL level wired connections RS 232 communication offers greater flexibility and the ability to integrate the laser system into your application software seamlessly For time critical applications that depend on precise timing between signaling and laser action the TTL wired connection 15 the better choice because the TTL connection minimizes latency time within the system allowing for more precise laser control A hybrid of these two control system can also be implemented for the greatest flexibility in integration Table 2 describes the command and query format of the RS 232 remote communication This is a short form versi
24. nated NA EMISSION This is an output pin and is an open collector when the diode is not energized Once the diode is energized through any of the control methods a transistor conducts this pin to GND NA Q SWITCH This pin is the input for an externally generated repetition rate and is normally held LO While the q switch ENABLE LED 15 NOT illuminated the system can be q switched through this input A TTL square wave signal at this pin will q switch the laser at the frequency of the input See note below and Apendix III for more information REMOTE DETECT This is an input pin and is normally HI at 5V Pulling this pin LO grounded locks out the front panel controls and enables the use of PIN 2 to turn the laser ON OFF GND SIGNAL This pin is a signal GND reference inputs should be referenced to this ground NA NA NA NA NA GND EARTH This pin is an earth GND reference g Note Minimum duty cycle at the Ext frequency input PIN 7 is 10 For greatest stability a 50 duty cycle is recommended Laser pulse width is not derived from the Ext frequency input This is controlled internally As the frequency is lowered energy per pulse will increase until a maximum energy is reached at 30 KHz The system will accept lower pulse frequencies down to a single pulse but the maximum energy per pulse is limited to a 30 KHz pulse See Appendix IV Single pulses can be generated at all repetition rates by intro
25. nder warranty where the repair work 15 done by DPSS Lasers Inc However DPSS Lasers Inc shall not be responsible for any shipping or transportation charges which shall be the sole responsibility of the customer NOT COVERED Damage due to abuse improper installation or application alteration accident negligence in use improper storage transportation or handling is not covered by this warranty This warranty shall not apply where the original equipment identifications have been removed defaced or altered DAMAGE IN SHIPMENT Your laser product should be inspected and tested as soon as it is received The product is packaged for safe delivery If the product is damaged in any way you should immediately file a claim with the carrier or if insured separately with the insurance company DPSS Lasers Inc will not be responsible for damage sustained in shipment CLAIMS ASSISTANCE Call DPSS Lasers Inc Customer Service or your local distributor for assistance Give our representative the full details of the problem Helpful information or shipping instructions will be provided If requested estimates of the charges for non warranty or other service work will be supplied before work begins Products being returned for repair must be shipped in their original shipping cartons to avoid damage DISCLAIMER THIS WARRANTY SHALL BEIN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED AND SHALL BEIN LIEU OF ALL WARRANTIES OF FITNESS AND MERCHANTABILITY
26. nual TITAN Series FIGURE 1 m 8 8 5 m 6n CJ u DIMENSIONS GIVEN IN 780 026 Rev 7 of 31 DPSS Lasers Inc User Manual TITAN Series S SYSTEM INSTALLATION INCOMING INSPECTION Immediately upon receipt the laser should be unpacked and inspected for shipping damage If none is evident test for satisfactory operation REQUIRED TOOLS FOR INSTALLATION Water 2 quarts distilled Use Laser coolant Isopropyl alcohol 12 cup Use Laser coolant additive Safety glasses for all persons present OD gt 5 355nm Use Laser eye safety Calibrated laser power meter Coherent FieldMate LD10 or equivalent Use Verifying laser performance One fluorescent card or business card Matte surface Use Beam diagnostics and alignment 3 16 Allen driver optional Use Attaching the laser to the work surface if needed UNPACKING Open the box and check the packing list Verify that all materials are present Note Retain all packing materials After unpacking inspect the box and all components of the laser for damage If any damage is found contact the carrier for immediate on site inspection All claims for damage should be directed to the carrier Call DPSS Lasers Inc Customer Service for additional information A WARNING THE USE OF CONTROLS ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFICED HEREIN MAY RE
27. om the output aperture when the laser is on and the q switch is disabled DAILY OPERATION OF THE LASER SYSTEM TURN ON PROCEDURE Turn on the cooling system Turn the key switch clockwise to the ON position to turn the power supply on After the INTLK LED stops blinking and turns off press the ON button The EMISSION LED will illuminate After the READY LED stops blinking and is steadily illuminated press the Q SW button The ENABLE LED will illuminate CW lasers will already be emitting UV and no further action is required When performing a cold start the first twenty minutes of operation may exhibit large power fluctuations while the laser reaches 80 output Over the next forty minutes the laser power should rise from 80 to 100 of specified power After this period the laser output should be stable and ready to use The laser beam can be tracked by briefly placing a matte finish white card in the beam path Move the card continuously to prevent burning the card Do not place the card in the beam any closer than one foot from the output aperture of the laser The DPSS Lasers Inc Titan Series laser system is designed to operate continuously for the lifetime of the laser with very little maintenance SHUTDOWN PROCEDURE Press the Q SW button The ENABLE LED will extinguish Press the STBY button The EMISSION LED and READY LED will extinguish Turn the key switch counter clockwise to the OFF position to turn the power supply off
28. on of the command set for users that are already familiar with the syntax For more in depth information refer to the earlier section on Remote Operation TABLE 2 RS 232 o Reboots Processor 2 41 _ MaxDiodeCurent xxx fet 071 Temperature Sene C T2 ____ Doubler Temperatrue Sene C HE Temperature XX Set Scanner EON Limit Set from 0 100 to SCANHI __ Set Scanner High Limit Set from SCANLO 103 000 HOURS Diode Hours TomeresO lhous SLST SavetolastSetings ________ Saves current parameters to Last Settings _ RLST Restore Last Stored Laser Settings ACA EAR Go f Switch Disable CW operation _____ QSwihEnble __ Q switeh at set rate ____ Switch Mode 0 CW lI Q Swithig av Firmware SIN T7 Character ASCH J Returns Faultbuss Status O No Faults 1 Indicated Fault Fault 780 026 Rev B 28 of 31 DPSS Lasers Inc User Manual TITAN Series 29 26 Reo 20K T 221 1K LD REQi gt U2BE TM 74HCT14 Z 28 4 TANT 1 Lo L RMT LSR ON E 055 nFAULT gt P U28A ad 74HCT14 m TP83 nEMISSION fs p n IK LJ 22 U28B p 7TAHCT14 R87 10K v PWRDIODE gt REMOTE CONTR
29. s APPENDIX IV u1pIM Ov 09 08 001 Oc OV 00000 000061 000081 000021 000091 000091 000071 000051 9140 Jase ses nd ysu eui 5 ayes peonpai si 1 y pue juejsuoo si ay eouis sdoup y ZHYOE 1 5906 y sy pepeus 905 24702 Je sen e y S 1958 y Jo es nd pue es nd eui 2 se1eJ 00002 ZH 000011 000001 00006 00008 00002 00009 00009 00007 AB1eu3 PIM esing M es nd UPIM SA day 0000 00006 00001 90 G m M 19MOd DPSS Lasers Inc 30 of 31 780 026 Rev B User Manual TITAN Series 31 SUPPORT CORPORATE OFFICES DPSS Lasers 2525 Walsh Ave Santa Clara CA 95051 TEL 408 988 4300 FAX 408 988 4305 EMAIL Sales DP
30. set the laser to external Q switch control lt value2 gt gt 3 set the laser to internal Q switch control set internal Pulse Repetition Frequency to lt value2 gt 20 300 KHz Restore laser settings temperature set points current set point and scan limits from Last Stored Parameters 0 100 lt lt value3 gt lt SCANHI SCANLO lt lt value4 gt lt 3 000 Save current laser settings temperature set points current set point and scan limits into Last Parameters memory Set the temperature value for device to Value5 Degrees C lt Value5 gt 15 entered in deg C 15 00 60 00 1 Laser Crystal 2 Doubler Crystal 3 Tripler Crystal 4 Diode Laser Diode Current in Amps Format NN NN A Laser Diode Set Point Current in Amps Format NN NN A Max Diode Set Current in Amps Format NN NN A Returns zero if Q Switch in continuous wave CW mode else returns 1 The number of hours of cumulative laser diode operation to nearest tenth of an hour Format NNNNN N hours Returns 0 if the laser is in stand by else 1 4 if the laser is ON Returns internal PRF in KHz Format NNN KHz 19 of 31 DPSS Lasers Inc User Manual TITAN Series TSn 2 TTL CONNECTION INTRLCK 20 Temperature of device n in Format XX XX C 1 Laser Crystal n 2 Doubler Crystal n 3 Tripler Crystal n 4 Diode Temper
31. ted to the laser during execution of an instruction 1 before the laser has transmitted the lt CR gt lt LF gt will be ignored by the laser The laser responds to illegal or unrecognized instructions by transmitting SYNTAX ERROR lt CR gt lt LF gt Commands specifying a value outside the allowable range for the parameter will cause the laser to return the following response followed by the maximum or minimum allowable value In such a case the present value will remain unchanged until an allowable value is entered NO MAX VALUE XX XX lt CR gt lt LF gt or NO MIN VALUE XX XX lt CR gt lt LF gt IN TIP A short form list of commands and queries can be found in Appendix III Command Format Bl Reboots the processor CS lt value1l gt Set the current for Laser Diode to lt value1 gt 0 00 lt lt Valuel gt lt Max Current where Max Current is determined by X41 GO Set Q Switch to continuous wave CW operation 780 026 Rev B 18 of 31 DPSS Lasers Inc User Manual TITAN Series 780 026 Rev Gl LASER N Q lt value2 gt RLST SCANLO lt value3 gt SCANHI lt value4 gt SLST TSn lt values gt Queries 1 251 2 41 2HOURS 2LASER Q 19 Set Q Switch to pulse mode using internal repetition rate set at Q lt value2 gt 0 set the laser to STAND BY N 1 turn laser ON locally lt value2 gt lt 3 set the laser to CW mode lt value2 gt 3
32. tem Fill the reservoir with 1 2 cup Isopropyl Alcohol and top off with distilled water Note Isopropyl distilled water solution is permitted for use in all distilled only locations Note The water level will drop when the unit is first turned on as air in the hoses and cold plate is replaced with water The reservoir will need to be topped off with distilled water If the cooling unit displays a low fluid alarm during this time simply cycle the power OFF and ON again to reset CONNECTING THE LASER CABLES Refer to FIGURE 2 Place the laser head on a table Close the shutter The mechanical laser output shutter is located on the front bezel of the laser head Slide the shutter lever to the right or left until it clicks into place When the lever is in the center the shutter is open Locate the electrical umbilical that connects the laser head to the power supply Secure each connector to its corresponding mate at the laser head indicated by the following labels RF 11 J2 J3 J4 J5 Jo INTLK and finally connect the two pin red interlock cable to its mating connector on the flow sensor in the water hose Repeat the above step with the free end of the umbilical bundle at the power supply end The red 4 pin connector will connect to the INTLK location at the power supply With the cooling system switch in the OFF position connect one end of an AC power cable into the cooling system and then into a suitable AC power outlet
33. the DPSS laser the polarization is vertical The value given to polarization is expressed as a ratio of the amount of vertically polarized to horizontally polarized light present in the beam Beam Pointing Stability The full angle through which the far field beam moves measured in microradians urad 780 026 Rev 25 of 31 DPSS Lasers Inc User Manual TITAN Series 26 APPENDIX Il DPSS LASER THEORY A laser is an optical device that amplifies light by means of stimulated emission of radiation The output of a laser is electromagnetic radiation light By placing a gain medium between two mirrors to form a light amplifier or resonator laser light is generated The light bounces back and forth between the two mirrors of the resonator extracting energy from the gain medium on each pass In the case of the DPSS Diode Pumped Solid State laser a Vanadate crystal is used as the gain medium and is supplied energy or pumped by an 808nm laser diode Refer to Figure 6 This 808nm light is absorbed by the gain medium and converted to light of approximately 1064nm in wavelength The generated wavelength is defined by an atomic energy transition of the Neodymium ions present in the host Vanadate medium The Vanadate gain medium provides adequate amplification to overcome the losses in the laser resonator from the mirrors gain medium and other optical elements and deliver useful power The 808nm laser diode emits light in a continuous
34. urned on Power supply boot up 15 seconds not complete Flow switch interlock connector not plugged in at power supply or laser head Water hoses interchanged at Cooling system Cooling system pump malfunction Laser head over temperature Power supply over temperature Interlock open Cooling system water not flowing Laser head over temperature Power supply over temperature Shutter not open REMOTE connector connected but not activated RF BNC cable not connected at power supply or laser head Beam path partially blocked Ambient temperature too high Cooling system not regulating It is normal for the laser output power to oscillate slightly during the first hour of operation 25 08 3l for proper operation Check J4 and J5 connectors at power supply and laser head for correct connection Turn on Cooling system Wait 30 seconds and press STANDBY button to clear fault Open Cooling system reservoir and verify that water is bubbling vigorously Verify that the flow switch interlock cable red twisted pair is connected at power supply and laser head Reverse water hose connections at Cooling system Touch laser baseplate to verify that it is close to room temperature Touch power supply enclosure and verify that it is close to room temperature Ensure that exhaust air is not recirculating through power supply or Cooling System Check all user installed interlocks Open Cooling system reservoir and verify v
35. wave CW mode That is the light is emitted continuously as long as the electrical power to the diode is maintained The Vanadate and laser resonator convert the continuous wave output of the diode into a more useful output for the end user The generated 1064nm light from the resonator will be continuous as well and therefore low in peak power In order to generate a more useful output with higher peak powers an acousto optical Q switch is placed in the resonator In this case Q stands for the quality of the resonator The quality of the resonator determines how well the cavity will generate light or more precisely the threshold level at which the laser will operate for a given gain in the gain medium In short the Q switch is an electronically controlled light valve within the resonator It stops the operation of the resonator by briefly spoiling its quality When the resonator is not lasing the Vanadate gain medium continues to receive energy from the continuous wave laser diode and a buildup of energy in the Vanadate occurs in the form of an electron state population inversion Once the Vanadate has absorbed as much of the 808nm energy as it can the Q switch is electronically opened and lasing 15 allowed in the resonator As a result of the high amount of stored energy in the Vanadate the resonator at this point generates light very rapidly and at high peak powers The resulting output is near infrared 1064nm light in the form of a pulse
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