Diode Laser Driver User Manual
Contents
1. Safety Warning All statements regarding safety of operation and technical data in this instruction manual will apply only when the unit is operated in accordance with this user s manual Before applying power to your 06 DLD 3xx diode laser driver make sure that the protective conductor of the 3 conductor power cord is correctly connected to the protective ground con tact of the socket outlet as improper grounding can cause a potentially fatal shock The line voltage setting marked on the rear panel must agree with your local supply and correspon ding line fuses must be used If the voltage setting is incorrect contact Melles Griot to request a service technician change the voltage The customer can change the line fuse Laser and photodiodes must be connected only with shielded connection cables Warning Improper grounding can cause a potentially fatal electric shock The unit must not be operated in an explosive environment Caution Use of mobile telephones handy phones or other radio transmitters within three meters of the diode laser drive could cause the electromagnetic field intensity to exceed the maximum values allowed by EN 50 082 1 Warranty Melles Griot warrants the 06 DLD 3xx series of diode laser drivers against defects in material and workmanship for a period of twelve months from the date of purchase Melles Griot will at its own option repair or replace without charge any item found to be defective within this2. RMA Return Material Authorization 5 2 List of Figures Figure 1 Operating and display elements on the front panel Figure 2 Operating elements on the rear panel Figure 3 Pin assignments for the LD OUTPUT connector Figure 4 Connecting the interlock with and without monitoring LED Figure 5 Connecting the diode laser and the photodiode Figure 6 Biasing schemes Figure 7 Changing the line fuse MELLES GRIOT 18 5 3 Category Certifications and Compliances Standards or description EC Declaration of Conformity EMC Australia New Zealand Declaration of Conformity EMC FCC EMC Compliance EC Declaration of Conformity Low Voltage U S Nationally Recognized Testing Laboratory Listing Canadian Certification Additional Compliance Equipment Type Safety Class Meets intent of Directive 89 336 EEC for Electromagnetic compatibility Compliance was demonstrated to the following specifications as listed in the Official Journal of the European communities EN 61326 Requirements for Class A electrical equipment for measurement control and laboratory use including Class A Radiated and Conducted Emissions 123 and Immunity 1 2 34 IEC 61000 4 2 Electrostatic Discharge Immunity Performance criterion C IEC 61000 4 3 Radiated RF Electromagnetic Field Immunity Performance criterion B IEC 61000 4 4 Electrical Fast Transient Burst Immunity Performance criterion C IEC 61000 4 5 Power Line Surge I
3. period Melles Griot standard terms and conditions of sale apply during the warranty period To authorize a return contact Melles Griot to obtain a return material authorization RMA number The customer is responsible for all shipping costs to Melles Griot For warranty 1 4 repairs Melles Griot will pay the return shipping costs For nonwarranty repairs the customer is responsible for shipping costs in both directions In the case of international shipments the customer is responsible for all applicable duties taxes and fees The diode laser driver must be returned to Melles Griot in its complete original packaging including the plastic foam parts If necessary ask for a replacement package This warranty is void if e The driver is exposed to extraordinary environmental extremes including but not limited to the following excessive heat or cold accumulated dust water damage excessive input voltage exposure to electrostatics excessive shock or vibration improper return packing shipping or handling or improper operation or application e The customer attempts to adjust laser power components e The customer attempts to repair or replace components beyond the scope described in the maintenance section of this manual Features The 06 DLD 3xx series diode laser drivers from Melles Griot are extremely precise current con trollers for diode lasers and LEDs Both the injection current and the optical output power out put o
4. IEC 320 100 V 115 V 230 V 15 10 fixed 50 60 Hz 06 DLD 301 25VA 06 DLD 302 30 VA 06 DLD 303 60 VA Category II Cat Il 0 to 40 C 40 C to 70 C Max 80 up to 31 C decreasing to 50 at 40 C 2 lt 3000 m 10 min lt 3 kg 147 x 73 x 317 mm 1 Non condensing Ordering Codes and Accessories Ordering Code Short Description 06 DLD 301 Diode laser driver current range 0 200 mA 6 V 06 DLD 302 Diode laser driver current range 0 500 mA 4 V 06 DLD 303 Diode laser driver current range 0 2 A 4 V 06 DLM 301 Temperature controlled diode laser mount for 3 and 4 pin diodes in 9 mm TO18 and 5 6 mm TO46 packages 06 DLM 302 Diode laser mount for laser modules in a 14 pin butterfly package programmable pinning 06 DLH 301 Shielded cable to connect the diode laser driver 06 DLD 3xx to a diode laser mount 5 MELLES GRIOT MELLES GriOT 1 7 1 7 1 Figure 1 Operating and display elements on the front panel 6 Operating Elements Operating elements on the front panel L3 L5 L4 L7 L6 L8 L9 SG a DIODE LASER CONTROLLER 06 DLD 301 en doren et O LiM DISPLAY MODE LIMI IM A CAL Pro CI CA Da E PD RANGE E ANNA L12 L13 L14 L15 L16 L17 L18 L19 L20 14 L22 L24 L23 Element Type Label Function L1 LED AG Selected polarity of the laser anode grounded L2 LED CG Selected polarity of the laser cathode grounded L3 LCD Display Displays performance parameters L4 LED mA Curre
5. laser on oc Pin 1 and pin 5 must be connected externally by a wire total resistance lt 430 Q When this connection is open the 06 DLD 3xx automatically switches into the LASER OFF mode 1 9 3 Figure 5 Connecting the diode laser and the photodiode Figure 6 Biasing schemes An LED can be connected in parallel with a resistor of lt 470 Q between pin 1 and pin 5 The LED lights up when the laser current is switched on LASER ON Connecting the diode laser and photodiode Connect the diode laser and the photodiode according to Figure 5 7 4 7 2 8 4 8 2 LD PD LD PD LD PD LD PD 2 PD 4 PD 2 PD 4 PD 3 LD 3 LD 3 LD 3 LD LD POL AG AG CG CG The ground connection of the diode laser pin 3 may be connected to the anode of the pho todiode pin 4 or to the cathode of the photodiode pin 2 This connection should be as close as possible to the diode laser to avoid measuring errors If the polarity selected with the switch LD AG CG R6 and the connection of the laser diode do not agree no current will flow through the diode laser The diode laser is always powered with respect to ground Compared to a floating driver stage this operation mode has the advantages of higher security for the diode laser and bet ter stability of the laser current To operate the photodiode with a bias voltage connect a battery in series with the photodi ode as shown in the Figure 6 gt pin 2 FE mo pin 4
6. required by these standards may occur when this equipment is connected to a test object 4 Minimum Immunity Test requirement 5 MOD IN port capped at IEC 61000 4 3 test 19 MELLES GRIOT MELLES CRIOT 5 4 20 Addresses North America Melles Griot Photonics Components Group 2051 Palomar Airport Road 200 Carlsbad CA 92011 Tel 800 835 2626 760 268 5131 Fax 760 804 0049 E mail techsupport catalog mellesgriot com Internet http wwvw mellesgriot com Europe Melles Griot BV Aalsbergen 2 6942 SE Didam 6900 AG Zevenaar The Netherlands Tel 31 316 333 041 Fax 31 316 528 187 Email info holland catalog mellesgriot com Internet http wwvw mellesgriot com Asia Melles Griot KK Pine Building 3F 3 11 2 Shibuya Shibuya Ku Tokyo 150 0002 Japan Tel 81 3 3407 3614 Fax 81 3 3486 0923 Email sales mgkk com Internet http www mgkk com
7. Display In addition to displaying the photodiode current IPD the actual output power of the diode laser can be displayed To accomplish this the driver display must be calibrated using the fol lowing procedure 1 Select constant current mode CONST 2 Set the laser current ILD or the photodiode current IPD to a value at which the optical output power of the laser diode is known The power can be obtained from the diode laser data sheet or preferably by measuring the diode laser output with an external optical power meter Using the UP and DOWN buttons L18 and L19 select the PLD display 4 Adjust the CAL PD potentiometer L13 until the display value matches the actual optical power w Anolog Modulation of the Diode Laser The output of the diode laser can be modulated in either the constant current CONST I or the constant power CONST P mode by applying an analog voltage to the MOD IN connector R1 on the rear panel of the driver The maximum allowed modulation voltage is 10 V and the input impedance of the MOD IN connector is gt 10 KQ The output of the laser in constant current and constant power is controlled respectively by the laser current ILD or the photodiode current IPD These are calculated by the following for mulas ILD ILD SET IMAX x VMmoD 10 V and IPD IPD SET 0 2 mA x VMOD where ILD SET or IPD SET are the values set by the adjust knob L10 Imax is the maximum out put curr
8. MELLES CRIOT The Practical Application of Light Create Control Bo s ition Kight Zu Y Barloworld Scientific Diode Laser Driver User Manual NOTICE This manual contains specifications descriptions and drawings of the diode laser drivers provided by Melles Griot Product specifications contained in this manual are subject to change by Melles Griot without prior notice Melles Griot will not be responsible for errors or omissions in this manual or for incidental or consequential damages in connection with the furnishing or use of this informa tion The information contained in this manual is the property of Melles Griot This document may not be photocopied duplicated or reproduced by any means without the prior written con sent of Melles Griot Comments or suggestions regarding this manual are appreciated and should be sent to the following address Melles Griot Photonics Components Group 2051 Palomar Airport Road 200 Carlsbad California 92011 USA Attention Customer Service Phone 760 238 5131 Fax 760 804 0049 E mail sales catalog mellesgriot com Publication date February 2006 2006 Melles Griot i MELLES GRIOT TABLE OF CONTENTS INTRODUCTION cienie ae 1 1 GENERAL DESCRIPTION 0 0000 0 2 1 1 Packing list occ ar ia pit 2 PR x dud er ee De nee dl ee Bari 2 ER ee la a ee hm boas 2 WA REalUresT ui aa dt RER ne 3 1 5 Technical AAA ie ae a na ea each in 4 15 1 INaMIAUal Gal
9. OUTPUT Connector for diode laser photodiode interlock status LED R6 Slide switch LD AG CG Switch for selecting the laser diode polarity anode or cathode ground R7 Label Serial number of the unit R8 Label Allowed and set line voltage ranges R9 Plug Line connector and fuse holder Initial Settings Prior to starting operation with the 06 DLD 3xx diode laser driver check to make sure that the line voltage specified on the letterplate agrees with your local supply and that the appropriate fuse is inserted If the line voltage is incorrect contact Melles Griot immediately If the fuse is missing or incorrect change the fuse according to the instructions given in the maintenance section Connect the unit to the line with the provided line cable Turn the unit on using the LINE switch L11 External components can be grounded to the chassis via the GND connector jack R4 The ground pin of the diode laser is internally connected to chassis ground After switching on the unit the LCD display L3 will illuminate and the appropriate indicator LEDs L14 L17 will light up to indicate the selected parameters Using the DOWN and UP keys L18 and L19 select the parameter value to be displayed Once turned on the 06 DLD 3xx is immediately ready for use Rated accuracy however is only reached after a warm up time of approximately 10 minutes 7 MELLES GRIOT 1 9 1 9 1 Figure 3 Pin assign ments for the LD OUTPUT conne
10. Turn off the 06 DLD 3xx and disconnect the line cable 2 Open the fuse drawer in the line connector R9 with a screwdriver 3 Replace the defective fuse one spare fuse is included in the fuse holder and close the drawer The fuse ratings and part numbers are shown in the tables below 100 V 250 mA Slow 250V T0 25A250V 115 V 250 mA Slow 250V T0 25A250V 230 V 160 mA Slow 250V T0 16A250V 100 V 500 mA Slow 250V TO 5A250V 115V 500 mA Slow 250V TO 5A250V 230 V 250 mA Slow 250V T0 25A250V Note All fuses are to be IEC 60127 2 1ll 4 3 General Care Protect the 06 DLD 3xx diode laser driver from adverse weather conditions The 06 DLD 3xx is not water resistant Do not store or leave the 06 DLD 3xx where the LCD display will be exposed to direct sunlight for long periods of time Attention To avoid damage to the 06 DLD 3xx diode laser driver do not expose it to spray liquids or solvents 4 4 Cleaning The unit and the LCD display can be cleaned with a cloth dampened with water or a mild 75 isopropyl alcohol solution 4 5 Repair The 06 DLD 3xx diode laser driver does not contain any user repairable or user replaceable modules It must be returned to Melles Griot for service To guarantee the factory specifications over a long period it is recommended that the instru ment be calibrated by Melles Griot every two years 4 6 Troubleshooting If your 06 DLD 3xx system malfunctions check the items i
11. a y AG with bias CG with bias With anode ground polarity connect the positive terminal of the battery to the cathode of the photodiode and the negative terminal of the battery to pin 2 With cathode ground polarity connect the negative terminal of the battery to the anode of the photodiode and the positive terminal of the battery to pin 4 Warning Connecting the battery with the wrong polarity may destroy the photodiode 9 MELLES GRIOT MELLES GriOT 1 9 4 10 Analog control output for the laser current An analog voltage proportional to the laser current ILD is available at the CTL OUT jack R2 The voltage can be used to drive a recorder oscilloscope or an A D converter card When the laser polarity is set to CG cathode ground the output is O to 10 Vdc When the polarity is set to AG anode ground the output is O to 10 Vdc The barrel of the CTL OUT connector is grounded Devices connected to this output should have an input resistance 210 KQ When connecting a load avoid ground loops Chapter 2 Operating Instructions 2 1 Setting the Current Limit lum Before operating a diode laser always set the limit for the injection current using the following procedure to protect the diode laser against destruction by operating errors 1 Switch on the unit with the LINE switch L11 If the unit had already been switched on switch off the laser current with the ON switch L9 2 Se
12. a ea A a ee ee 4 1 5 2 COMMON data crop o Keke arena 5 1 6 Ordering codes and accessories ooooccoocccocccoocc nennen 5 1 2 Operatingelements viciosas Ha ee a pena od 6 1 7 1 Operating elements on the front panel 0 00 0 6 1 7 2 Operating elements on the rear panel 22cuceeneeeeren nn 7 1 8 IMITA setings 2 ar A A Me ae eee eo 7 1 9 Connecting COMPONENTS ici roer ne are aan 8 1 9 1 9 pole sub D output jack nnna nunnana cette eee 8 1 9 2 Interlock and control LED for LASER ON 0 0 2 0000000 c cee cence 8 1 9 3 Connecting the laser diode and photodiode 0 00 9 1 9 4 Analog control output for the laser current s s 10 2 OPERATING INSTRUCTIONS ooo 11 2 1 Setting the Current Limit ILM 2 2 0 2 cisat st i Erra EEEE a E a 11 2 2 Selecting the diode laser polarity 0 0 11 2 3 Constant current mode CONST I Lo 12 2 4 Constant power mode CONST P wc ceca scannen ea 12 2 4 1 Changing the IPD setting range 16 eects 13 2 5 Calibrating the optical power display 0 000 002 cece ee eee 14 2 6 Analog modulation of the diode laser 2 0 eee eee 14 3 REMOTE CONTROL aE c neces 15 4 MAINTENANCE EEEE EEEE EEEE 16 Al ne voltage es a a a ee ae sd 16 24 2 Replacing the line TUS oratoria ar sr ha en eed ned 16 4 3 Generali sn co ad tar re td A oa ee rel 17 4 4 Cleaning ee 17 4 5 N 0 O 17 2 6 TOUblESHOOLING eseis obec st area ee ae 17 e a Bee B
13. ags a ea a ee 18 5 1 UStOFACIONYMS resi ae an aan are ea 18 52 Wist OF FIQUIES uote aria der abends 18 5 3 Certifications and compliances n susunu oo 19 5 4 Addresse ita tl an 20 ii MELLES GRIOT Introduction This instruction manual contains all the specific information necessary to operate the 06 DLD 3xx series of diode laser drivers Chapter 1 provides a general description of the laser driver Chapter 2 provides complete instructions for operat ing the system manually Chapter 3 outlines a simple method for remotely controlling the driver Chapter 4 describes the routine maintenance functions that should be performed by the operator Chapter 5 contains a listing of the acronyms used in this manual along with a listing of figures compliance data and pertinent addresses Warning This manual contains WARNING labels in this form to indicate personal danger or possible damage to equipment Please read these carefully NOTE This manual also contains notes and hints written in this form 1 MELLES GRIOT Chapter 1 General Description MELLES GRIOT 1 1 1 2 Caution 1 3 2 Packing List When unpacking the diode laser driver the following items should be found e The 06 DLD 3xx diode laser driver e The power cord with a connector corresponding to the ordering country e The user manual e The 06 DLH 301 connection cable If any of these items are missing contact your nearest Melles Griot representative
14. ctor 1 9 2 Figure 4 Connecting the interlock with and without monitoring LED MELLES GRIOT 8 Connecting Components 9 pin sub D output jack Depending upon the version 06 DLD 3xx diode laser drivers from Melles Griot can drive all diode lasers up to a maximum current rate of 2 A If the 06 DLD 3xx driver is used with a Melles Griot diode laser mount use an 06 DLH 301 cable to connect the LD OUTPUT R5 connector on the back panel of the driver to the LD DRIVER connector on the laser mount NOTE If the Melles Griot 06 DLM 301 diode laser mount is used the polarity of the diode laser and photodiode must be set in the mount refer to the individual operation manual If other diode laser mounts are used connect the diode laser and if provided the photodiode with shielded cables to the LD OUTPUT R5 jack using the pin assignment shown in Figure 3 5 4 3 2 1 00000 2 9 8 7 6 Pin Connection Interlock and status LASER ON OFF Photodiode cathode Diode laser ground Photodiode anode Digital ground for pin 1 Not used Diode laser cathode voltage at anode ground Diode laser anode voltage at cathode ground Not used WOON DAU BWHN Interlock and control LED for LASER ON Pin 1 and pin 5 of the LD OUTPUT jack R5 are test contacts which are used to determine whether a diode laser is connected or whether the connection to the diode laser has been interrupted during operation oc Y LED
15. diode laser is interrupted during operation or if no diode laser is pres ent the output is switched off automatically The ON LED L8 extinguishes the OPEN LED L6 lights up and a short warning beep is sounded Pressing the ON button L9 extinguishes the OPEN LED Once the fault has been corrected press the ON button again to switch on the laser current The laser current can be modulated via the MOD IN R1 connector Changing the Iro Setting Range Set the operating point in constant power mode using the following procedure The full scale of the adjust knob L10 can be set from 600 yA to 2 mA by adjusting the PD RANGE poten tiometer L24 1 Turn the PD RANGE potentiometer L24 completely counterclockwise i e full scale 600 pA 2 Turn the adjust knob L10 completely counterclockwise 3 Select constant power mode CONST P connect the laser diode and the photodiode and switch on the laser current 4 Set the desired photodiode current with the adjust knob 5 If by turning the adjust knob fully clockwise the desired photodiode current Ipp cannot be reached turn the PD RANGE potentiometer clockwise until the desired setting range is reached NOTE In the constant power mode changing the setting of the PD RANGE potentiometer L24 changes the set value In the constant current mode the PD RANGE potentiometer does not function 13 MELLES CRIOT MELLES GriOT 2 5 2 6 14 Calibrating the Optical Power
16. ecause the output for the diode laser and the input for the photodiode are bipo lar all polarities of commercially available diode lasers can be used A control signal located at the output jack can operate an external LED to indicate a LASER ON condition 3 MELLES GRIOT The injection current or the optical output power of the diode laser can be modulated via a modulation input at the rear of the unit For monitoring purposes a voltage proportional to the diode laser current is provided at an analog control output at the rear If an error occurs or if the limit for the laser current is reached the corresponding LED lights up and a short warn ing beep sounds A line filter coupled with careful transformer shielding provides low ripple and noise at the output and internal cooling of the diode laser driver with a fan protects the unit against over heating in case of high environmental temperature With free air circulation safe operation of the unit is guaranteed up to 40 C ambient temperature Warning Do not obstruct the air ventilation slots in the housing 1 5 Technical Data 1 5 1 Individual Data 06 DLD 301 06 DLD 302 06 DLD 303 Constant current mode Control range continuously variable 0 200 mA 0 500 mA 0 2 A Setting accuracy 0 1 mA 0 1 mA 2 mA Resolution 0 01 mA 0 1 mA 0 1 mA Compliance voltage gt 6V gt 4V gt 4V Noise 10 Hz 10 MHz lt 1 5 pA lt 3 pA lt 15 pA Ripple 50 Hz rms lt 1 5 pA lt 2 pA lt 5
17. ent of the driver and VMOD is the voltage at the MOD IN connector R1 To modulate the laser output use the following procedure 1 Start operation in constant current or constant power and adjust the desired set value with the adjust knob L10 2 Connect the modulation source to the MOD IN connector R1 on the rear panel of the driver Avoid ground loops when connecting the modulation source 3 The actual diode laser current ILD can be monitored at the CTL OUT connector R2 on the rear panel of the driver If the injection current ILD reaches the set current limit Ium the LIM LED L7 lights up a short warning beep sounds the laser current is limited to ILim and ripple and noise may no longer meet specifications Chapter 3 Remote Control 06 DLD 3xx series drivers do not include a standard computer interface Simple semiautomatic systems can be created however by coupling the analog modulation capability with the interlock system After the laser has been turned on a relay contact or an open collector transistor inserted in the interlock line can be used to switch the unit off at any time It is not possible however to turn the laser current on remotely The current can be set remotely via a D A converter using the MOD IN function If the adjust knob L10 is set fully coun terclockwise IPD SET 0 the laser current can be varied from O to Ium by applying a O to 10 Vdc signal to the MOD IN connector R1 Inversely by tu
18. f a diode laser can be controlled simultaneously by using a Melles Griot temperature con troller in conjunction with the driver To protect the diode laser against damage the 06 DLD 3xx diode laser drivers provide the fol lowing protection features e Softstart function e Adjustable limitation of injection current e Interlock open circuit monitoring of the laser diode mount connection e Electronic short circuit for the laser diode in off mode e Separate control to switch the laser diode current on and off e Monitoring LED for LASER ON mode The 06 DLD 3xx series diode laser drivers are easy to use because of the intuitively structured front panel Operating parameters are shown on an illuminated 4 2 digit LCD display The parameter to be displayed is selected with UP and Down buttons An on off delay and the softstart function protect the diode laser against undesired transients An independent hardware limit for the injection current set with a 20 turn potentiometer protects the diode laser from operating errors With the output open the laser diode is short circuited electronically so that no voltage is applied to the diode laser When turned on the 06 DLD 3xx diode laser driver automatically defaults to the LASER OFF mode The laser current can then be switched on and off with a separate button located in the front panel The diode laser or photodiode is connected to the driver via a 9 pin sub D socket at the rear of the unit B
19. lect the parameter ILim using the UP and DOWN buttons L18 and L19 Use a screwdriver to set the potentiometer LIM L12 at the desired current NOTE The current limit can be displayed at any time by selecting the parameter Ium If the laser current reaches the set current limit lim during operation the LIM LED L7 lights up and a short warning beep is sounded The current limit can also be adjusted when the output laser current switched on however avoid an adjustment when the LIM LED is lit 2 2 Selecting the Diode Laser Polarity With the 06 DLD 3xx diode laser driver all possible polarities of the diode laser and the moni tor diode can be used The diode laser will always be powered with respect to ground Compared to a floating driver stage this operation mode provides greater security for the diode laser as well as higher laser current stability and lower noise Prior to turning on the laser current the correct polarity of the diode laser must be selected by switching off the diode laser current L9 and selecting the desired polarity with the LD AG CG switch R6 The selected polarity is then indicated by the AG or CG LED L1 or L2 For safety reasons the LD AG CG switch has a mid position In this position neither the AG nor the CG LED is lit and the laser current cannot be switched on NOTE For diode lasers with a built in monitor diode the common pin of the diode laser and the photodiode is the ground pin If the di
20. m during operation the LIM LED L7 lights a short warning beep is sounded and the laser current is limited to the value of the current limit If the LIM LED lights up noise and ripple no longer correspond to the specifications for normal operation If the connection to the diode laser is interrupted during operation the diode laser current is switched off automatically the ON LED L8 extinguishes the OPEN LED L6 lights up and a short warning beep is sounded If the output is switched on while the interlock is closed and there is no diode laser connect ed the ON LED L8 lights up and the output is switched on Immediately afterwards the 06 DLD 3xx driver recognizes that the diode laser is missing and switches the output off the ON LED extinguishes and the OPEN LED L6 lights up Pressing the ON switch L9 extinguishes the OPEN LED Pressing the ON switch again turns on the output If a photodiode is connected to the diode laser the display can show the photodiode current Ipod or the optical power PLD by pressing the UP and DOWN buttons L18 and L19 The laser current can be modulated via the MOD IN connector R1 This is discussed in detail later in this chapter Constant Power Mode CONST P If a photodiode is connected the diode laser can be operated in constant power mode using the following procedure 1 Start operating the 06 DLD 3xx in constant current mode 2 Using the UP and DOWN buttons L18 and L19 se
21. mmunity Performance criterion C IEC 61000 4 6 Conducted RF Immunity Performance criterion B IEC 61000 4 11 Voltage Dips and Interruptions Immunity Performance criterion C EN 61000 3 2 ac Power Line Harmonic Emissions Complies with the Radiocommunications Act and demonstrated per EMC Emission Standard 1 2 3 AS NZS 2064 Industrial Scientific and Medical Equipment 1992 Emissions comply with the Class A limits of FCC Code of Federal Regulations 47 Part 15 Subpart B 1 23 Compliance was demonstrated to the following specification as listed in the Official Journal of the European Communities Low Voltage Directive 73 23 EEC amended by 93 68 EEC EN 61010 1 A2 1995 Safety requirements for electrical equipment for measurement control and laboratory use UL3111 1 Standard for electrical measuring and test equipment ANSVISA S82 01 1994 Safety standard for electrical and electronic test measuring controlling and related equipment CAN CSA C22 2 No Safety requirements for electrical equipment for 1010 1 measurement control and laboratory use IEC61010 1 A2 1995 Safety requirements for electrical equipment for measurement control and laboratory use Test and measuring Class 1 as defined in IEC 61010 1 Annex H grounded product 1 Compliance demonstrated using high quality shielded interface cables 2 Compliance demonstrated with 13 DLH 301 cable installed at the LD Output port 3 Emissions which exceed the levels
22. n the table below Fault Module does not work at all no display No laser current Cannot get expected current and or power in CONST P mode Probable Cause Unit unplugged Unit not turned on Line fuse open Interlock open or interlock impedance too high Laser current not turned on Current limit ILim set to O Laser diode not installed or improperly installed Incorrect laser diode polarity Photodiode connected improperly ILIM set too low Adjust knob control range set too low Remedy Connect to line power making sure that voltage is correct Press LINE switch L11 Replace line fuse Short interlock with connection that is lt 430 Q Press ON button L9 Increase luim by turning the LIM potentiometer L12 clockwise Correct laser diode installation Change laser diode polarity or change polarity using the LD AG CG switch R6 Check photodiode connection bias and polarity Increase ILIm by turning LIM potentiometer L12 clockwise Increase adjust knob range by turning PD RANGE potentiometer L24 clockwise 17 MELLES GRIOT Chapter 5 Listings 5 1 List of Acronyms The following acronyms are used in this manual ac Alternating Current A D Analog to Digital Converter AG Anode Ground CC Constant Current mode CG Cathode Ground CP Constant Power mode dc Direct Current LCD Liquid Crystal Display LED Light Emitting Diode PD Photodiode TEC Thermoelectric Cooler Peltier element
23. nt display in mA L5 LED mW Power display in mW L6 LED OPEN No diode laser connected L7 LED LIM Adjusted current limit reached L8 LED ON Laser current is switched on L9 Switch ON On off switch for the laser current L10 Knob Enter setting values L11 Switch LINE Line switch L12 Pot LIM 1 Potentiometer for setting the current limit L13 Pot CAL Potentiometer for calibrating the power display L14 LED PLD Displaying optical output power L15 LED IPD Displaying photodiode current L16 LED ILD Displaying laser current L17 LED ILIM Displaying current limit L18 Button DOWN Select the displayed value L19 Button UP Select the displayed value L20 LED P Constant power mode L21 LED Constant current mode L22 Button P Select constant power mode L23 Button Select constant current mode L24 Pot PD RANGE Potentiometer for setting the photodiode current range 1 7 2 Figure 2 Operating elements on the rear panel 1 8 Operating elements on the rear panel R1 R2 R3 R4 LD OUTPUT oo000 apoo LD AE TEE x L E R5 R6 R7 R8 R9 Element Type Label Function R1 BNC connector MOD IN Modulation input analog control input 10 V to 10 V R2 BNC connector CTL OUT Analog control output O to 10V R3 Fan R4 Banana jack GND Connector for chassis ground R5 Sub D 9 socket LD
24. ode laser is connected correctly but the selected polarity of the diode laser is incorrect the diode laser current cannot be switched on If the position of the LD AG CG switch is changed while the laser current is switched on the diode laser current will be switched off automatically NOTE For safety reasons select the polarity for the laser diode only when the laser diode current L9 is switched off 11 MELLES CRIOT MELLES GRIOT 2 3 Note 2 4 12 Constant Current Mode CONST I Use the following procedure to operate the 06 DLD 3xx driver in constant current mode Switch on the 06 DLD 3xx Select a suitable current limit lim Select the appropriate laser polarity Connect the diode laser Select the display ILD with the UP and DOWN buttons L18 and L19 Turn the adjust knob L10 completely counterclockwise Select the constant current mode by pressing the button L23 Switch on the output with the ON switch L9 The ON LED L8 will light the output will be activated and the current will slowly rise over 1 second to the value set with the adjust knob oN AMBRWN NOTE The current output can be switched on only after the LD OUTPUT connector R5 has been connected correctly The display now shows the injection current ILD The adjust knob L10 can be used to set the laser current anywhere between O mA and the selected current limit Ium If the injection cur rent ILD reaches the set current limit Iu
25. pA Transients lt 200 uA lt 500 pA lt 100 yA Short time fluctuations 15 sec 0 10 Hz lt 10 pA lt 10 pA lt 2 mA Temperature coefficient 50 ppm C 50 ppm C 50 ppm C Drift 30 min 0 10 Hz 20 pA 50 pA 200 pA Constant power mode Control range photodiode current 5 pA 2 mA 5 pA 2 mA 5 pA 2 mA Setting accuracy 2 pA 2 pA 2 pA Resolution photodiode current 0 1 pA 0 1 pA 0 1 pA Resolution optical power 1 uW 1 uW 0 1 pW Laser current limit Setting range 0 200 mA 0 500 mA 0 2 A Setting accuracy 0 5 mA 1 5 mA 5 mA Resolution 0 01 mA 0 1 mA 0 1 mA Analog modulation voltage control Input resistance 10 kQ 10 kQ 10 kQ Bandwidth CC dc 250 kHz dc 150 kHz dc 50 kHz Modulation coefficient CC 20 MAV 5 50mAV 5 200 mA V Modulation coefficient CP 0 2 mMAV 5 0 2 MAV 5 0 2 MAV 5 Control output Load resistance 10 kQ 10 kQ 10 kQ Transfer coefficient 50 VWA 5 20 WA 5 10 VA 5 MELLES GRIOT 4 1 5 2 1 6 Common Data Connectors Laser diode photodiode LD ON signal interlock 0 5 V LD OUTPUT Modulation input 10 V to 10 V MOD IN Control output 0 10 V CTL OUT Chassis ground Line input General data Line voltage Line frequency Power consumption max Line power overvoltage Operating temperature Storage temperature Relative humidity Pollution degree indoor use only Operation altitude Warm up time for rated accuracy Weight Dimensions W x H x D 9 pin D type BNC BNC 4 mm banana
26. rning the adjust knob fully clockwise IPD SET ILIM a O to 10 Vdc signal at the MOD IN connector varies the laser current from IL M to O The input resistance of the MOD IN connector is gt 10 kQ By connecting an A D converter to the output CTL OUT connector R2 the laser current can be easily be monitored The output voltage is O to 10 Vdc with a grounded cathode and 0 to 10 V with a grounded anode Load resistance should be gt 10 kQ NOTE All operating elements of the 06 DLD 3xx are active at any time For automatic tests make sure that the manual settings are not changed during operation 15 MELLES CRIOT Chapter 4 Maintenance MELLES GRIOT 4 1 4 2 Figure 7 Changing the line fuse 06 DLD 301 06 DLD 302 303 16 Line Voltage The 06 DLD 3xx diode laser driver operates at fixed line voltages 90 115 Vac 104 132 Vac or 207 264 Vac Prior to starting operation make sure that the line voltage specified on the information label agrees with your local supply If it does not a qualified service person is required to change the operating line voltage Contact Melles Griot for assistance Replacing the Line Fuse If the line fuse has opened as a result of line distortions incorrect line voltage or other causes it can be easily replaced from the rear without opening the unit using the following proce dure Warning To avoid risk of fire use only the appropriate fuse for the corresponding line voltage 1
27. t the display to Ipp and observe the current from the photodiode For stable power in constant power mode the photodi ode current must be at least 5 yA NOTE If the photodiode current IPD is negative the polarity of the photodiode must be reversed 2 4 1 Switch off the laser current by pressing the ON switch L9 Press the MODE button P L22 to select the constant power CONST P mode Set the adjust knob L10 completely counterclockwise Switch on the laser current by pressing ON again The ON LED L8 will light The current will slowly increase over approximately 1 second to the value set with the adjust knob 7 By using the adjust knob the photodiode current and thus the optical power of the laser diode can be increased until the laser current ILD reaches the selected current limit ILM am A If the desired photodiode current Ipod cannot be reached with the adjust knob the range of the adjust knob can be changed by adjusting the PD RANGE potentiometer L24 If a photodiode is not connected or the polarity of the photodiode is incorrect the laser cur rent increases to the set current limit Ium as soon as the output is switched on Likewise if the photodiode current is interrupted in constant power mode the laser current increases to the set current limit At the current limit the output power is no longer regulated and output rip ple and noise will exceed the product specifications If the connection to the
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