PiLAS User Manual - BBN International
Contents
1. 1 4 5 Manufacturer Identification Label for EIG1000D 000 00 ccc ccccccccccccceccececceecesccececeseceseseseeeess 5 1 4 6 Manufacturer Identification Label for the laser Head cc cc ccccccccccccccsccccccceceesesceesesessessesseeess 5 1 5 Delivery VOMUIMEC seicsccsscccuscsnscccsessssensesesceseubocssssesesasesentevevsesessssvenscsesscdesscavetecsessasessatesbectessessssenecs 6 PAR TIT ODI CTION EGERN deb REEE SER ENEE KE REESE REELT E E EE BESPARELSE EDER A 3 Operations cavistesnecinebsdavevcdvaneas ocho Was lanacesuwaudcacacavaavesasbaadabicenevsacbibenceuitace 33 Installation ci sessccssccvcenecesdcscnsdencsccsceavennscnncseescobsssosdsencocssesseseabevcoseetoeaasendseoosssoadsesesnncannesoosassscnnece 8 3 2 OPOration sicerecccsccseasecaccastescsssaseccbeoesstuacenscisoseocetteceasncbecsessttecsescdbecescsstengageiseonssstsesbnscusecagcsteeesasees 8 321 Elements of the controk mit Aanensen thecvoseeueleees sacsVoes weeds ata a n a N E 8 32 2 SA N V E UAN E EE E E E E E A E A EEE E E E pcieesbens 9 32 35 s FREQUENCY Meniuri a E e RERE Y E O N a E E ah 9 3 2 4 TUNE Menu Adjustment of Optical Pulse cee eecceeescecesceceseeceseeceeecesceceeecseecseecseeeeeeesaes 9 32 55 ERIGG ER LEVELS Ment sorre o E E EN eed ENR whoo 10 3 26 TRIGGER SLOPE Metis manen rea re rr a a BAMA SBR RA is SE acd 10 3 2 7 TRIGGER IMPEDAN CE MU 5 ioe a ar rar TE 10 3 2 8 TUNE DEFAULTS Menu 0 cccccccesscceesssceceessceccessceecessseecc2. Rev 3 0 Dec 04 13 Laser Beam Coupler 60SM e Spectral range 390 2100 nm Adjustable and focusable for singlemode fibers with FC connectors optionally SMA Inclined or straight fiber coupling axis Universal system for laser diodes gas and solid lasers e Coupling optic focusable and adjustable to the fiber A pin screw M1 6 for the additional locking of the fiber ferrule is integrated into the FC connector e Circular V groove and matching cylinder system for the orientation of the polarisation axis and for a form locking connection 1 Laser Beam Coupler 60SM 7 Singlemode fiber assembled in fiber ferrule 2 5 Internal lens focusing with eccentric mm key 50HD 15 8 Lens locking with screw driver 1 2 mm type 3 Adapter flange with matching cylinder 9D 12 and circular V groove 9 Additional locking of the fiber ferrule with screw 4 Adjusting flange with homokinetic driver 1 2 bearing and 10 Adjustment of the polarisation axis 5 Integrated adjustment and locking 11 System adapter assembled at laser beam source screws for the 3 axial tilt and fine 12 Conus screws for system locking with hex key adjustment hex key SW1 5 type SW1 5 50HD 15 6 Singlemode fiber with FC connector Please note that the system adapter may be look different Adjustment of the laser beam coupler 60SM The 3 axial lockable tilt adjustment of the laser beam coupler D and E allows positioning the laser s
3. at each frequency For every frequency the last TUNE value is stored For example if the last TUNE value at 100 kHz was 25 0 and at 200 kHz 50 0 changing the frequency from 100 kHz to 200 kHz automatically changes the corresponding TUNE value from 25 0 to 50 0 This change of the corresponding TUNE value is done only after the next menu TUNE menu is selected by pressing the MODE key The instrument stores the changed TUNE values in an internal battery backed up RAM even after switching off the instrument Please note that the setting of the TUNE values is different at different frequencies Please check the emission when changing the operating frequency For detailed setting please see the test report as a reference where you find the appropriate values for single pulse emission at different frequencies Please note that the setting of the optimum TUNE values for single pulse emission may differ up to 10 when repeating the test measurements in the test report at different places and setups Please check the emission at your setup Please make sure to observe the indicated warm up time for receiving the nominal pulse specifications The warm up time refers to the entire system running which means the optical head is triggered If the entire system is already switched on and at stand by mode for a while the warm up time is reduced to 5 min 3 2 5 TRIGGER LEVEL Menu TRIGGERLEVEL TTL 1 40 The trigger level of the external
4. be impaired Always replace blown fuses with the same rating and acting speed ESD Electrostatic discharge ESD on or near the connectors can damage electronic devices inside the instrument Personnel should touch the metal frame of the instrument for a second before touching any connector Caution use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure There is no scheduled maintenance necessary to keep the product in compliance There is no service allowed by the customer The driver or laser head are not to be opened by the customer Rev 3 0 Dec 04 3 1 4 Laser Safety 1 4 1 General Remarks The radiation of the laser diode used in this instrument may be visible or invisible The laser diode emits radiation in the 370 nm to 1560 nm spectral region Use caution to avoid hazardous exposure to the beam Take precautions to eliminate exposure to a direct or reflected beam Do not view the laser beam directly or indirectly with optical instruments or human eye 1 4 2 Laser Class This PiLas laser system is classified as class 1 laser product according to IEC 60825 1 Ed 1 2 2001 08 This laser product is designed as Class 1 during all procedures of operation The laser radiation is emitted through the optics at the front side of the optical head or by an attached optical fiber guiding the laser light 1 4 3 Laser Warning Labels According to
5. laser safety regulations the following class 1 laser product explanatory label with relevant laser parameters is used For the detailed laser parameter please see the test report According to laser safety regulations the following class 1 laser product aperture label is used According to laser safety regulations the following hazard label is used Rev 3 0 Dec 04 4 1 4 4 Label Location The explanatory label is attached on top of the laser head as shown in the diagram The laser aperture label is attached on top of the laser head with the arrow pointing towards the laser emission aperture as shown in the diagram The hazard label is attached on top of the laser head near the laser emission aperture as shown in the diagram Explanatory label Aperture label Hazard label Label location diagram PiLas laser head with standard collimating optics 1 4 5 Manufacturer Identification Label for EIG1000D Location rear side of EIG1000D Advanced Advanced Laser Diode Systems isserieie A L S GmbH Schwarzschildstr 6 Systems 25 12489 Berlin Germany Manufactured Month April Year 2006 moder EIGIOO0D sm 0297 vor 280 115 amp 0 2 0 4 Made in Germany Does not comply with FDA performance standards for laser products 1 4 6 Manufacturer Identification Label for the laser head Location bottom of the laser head Advancod amg Advanced Laser Diode Systems Laser Bl de ae ALS GmbH
6. 1 2 4 Micro Focus A micro focus can be used for focusing the collimated leaser beam to a small spot size in a certain distance in dependence of laser source distances and focal lengths The micro focus is inserted into the fiber collimator and is fixed with three small slotted headless screws at the front end of the main housing of the fiber collimator 4 1 3 System with internal fiber coupling if ordered 4 1 3 1 Fiber collimator A fiber collimator can collimate the divergent output beam of the fiber Please insert the FC PC connector of the fiber gently in the right position watch the aligning plug to the reception of the collimator Only tighten it lightly Always use a protective cap for unused connectors or receptions in order to avoid damage to the optics and to the bare fiber end and to keep all parts clean If the fiber collimator comes with an eccentric key the collimation can be optimized by adjusting the collimating lens position Before using the eccentric key the two small screws looking the collimating lens must be loosen If the optimum collimation is achieved these screws should fix the collimating lens tube for stability 4 1 3 2 Micro Focus A micro focus can be used for focusing the collimated leaser beam to a small spot size in a certain distance in dependence of laser source distances and focal lengths The micro focus is inserted into the fiber collimator and is fixed with three small slotted headless screws at
7. Advanced Laser Diode Systems A L S GmbH Schwarzschildstr 6 D 12489 Berlin Germany Tel 49 0 30 6392 6525 Fax 49 0 30 6392 6521 www alsgmbh de info alsgmbh de Advanced laser Diode Tamma Systems lt amp Picosecond Injection Laser PiLas Pulse Repetition rate 1MHz Owner s Manual Advanced Laser Diodo ZE Systems ZZ UP MODE HEAD TRIGGERED Bomme m l OFF ON DOWN Stand by OUT TRIG IN TRIG OUT Q l 5V Max 5V Max 500hm Rev 3 0 Dec 04 Content TGC 774 AL coe ott stele ae aae eE RENEE NS EJERE SENER TRE DESK TERE SENE SERENE RYES 1 1 Warranty and ASSISTANCE scsscciscisesscsssssssssensessecsesassssnnsssocacssosssonnsosdansesosesonsessasdssssdssessassbesssescess 3 1 2 Maintenance SDR SSR EN eee ESTERE R RES SENE ANENE esac eens 3 1 3 General Safety Considerations cscsssscssssccsssscsssccssscsssssssssssessscsssssssssasssssssesssscssssssssases 3 VA Laser Sarety sicccisscsssccscssocscevssssvscscsnnctesaesssvetessesesevosssbocesosseseesseshecesecsedsssecteacdsesdessessesovessescsesnesess 4 F L General Remarks narn ees te Sees ed oR oa vs ha avd hh ee Miss oS 4 1 42 Laser CLASS cess ekg Se shia Bed ee age BS Sd cE hss sad Se eee he ES 4 1 4 3 Laser Warning Labels sir rarere E alene E 4 1 4 4 Label Locatione ccccccccccccccccccccccccccccccecceccceeceeeceeeeeeeeeeeeeeeeeeeeeeeeseseceseceseeeseceseseeceeseseceseeseseseesesess 5
8. ENCY Menu FREQUENCY The frequency is set by pressing the UP or DOWN key 3 to increase or decrease the frequency respectively The frequency offers 1 2 and 5 steps per decade Additionally the choices single and extern can be set in the FREQUENCY menu If single is selected pulse emission follows after pressing the MODE key If extern is selected the instrument can be triggered externally At each trigger event at the trigger input 6 exactly one optical pulse will be emitted The frequency and the appropriate TUNE value are stored after the next menu TUNE menu is selected by pressing the MODE key 3 2 4 TUNE Menu Adjustment of Optical Pulse TUNE 20 4 The optical pulse emission is adjusted by the UP or DOWN keys 3 which increase or decrease the electrical pumping energy to the laser diode from 0 to 100 percent If your system is supplied with a gain switched laser diode a clear single pulse is only generated up to a certain TUNE value that may differ for each frequency A larger TUNE value increases the electrical pumping energy to the laser diode and leads to a higher peak power slightly shorter pulse width and a significantly increasing pulse tail Rev 3 0 Dec 04 9 For every frequency the optimum TUNE value for single pulse emission can be recalled by switching to the TUNE DEFAULTS menu please see below These factory settings correspond to the optimum TUNE value for achieving a single optical pulse
9. Schwarzschildstr 6 Systems 12489 Berlin Germany Manufactured Month February Year 2006 model PILOAT sm 0287 Complies with European laser safety norm EN 60825 1 11 01 Rev 3 0 Dec 04 5 1 5 Delivery Volume Control Unit EIG1000D Optical Head s PiLnnn SUB D 25p Cable PiLas head EIG1000D PIL MH 01 AC Power Cable Manual with individual test reports Rev 3 0 Dec 04 6 2 Introduction The PiLas is a compact system generating ultra short optical pulses using diode lasers The system consists of a control unit and an optical head with the electrical driver and the laser diode The optical head is configured to emit short light pulses within one wavelength in the spectral region between 370 nm and 1550 nm Each head is individually adjusted to the laser diode to achieve optimal pulses emission performance down to pulse widths of 15 to 50 ps and optical peak powers between 50 and 1500mW Different optical output options are available including free space collimating optics FC PC connectors for multimode or single mode fibers and different micro foci Repetition rates of up to 1 MHz very low jitter and different triggering possibilities make the PiLas a flexible and reliable system suitable for a wide range of applications The PiLas system uses the technique of gain switching of laser diodes The laser diode represents a low impedance load which is driven by special electronic circuit that generates an
10. ced Laser Diode Systems A L S GmbH 2004 All rights reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copyright laws 1 1 Warranty and Assistance This instrument manufactured by Advanced Laser Diode Systems is warranted against defects in material and workmanship for a period of 12 months from date of shipment to the customer During the warranty period Advanced Laser Diode Systems will at its option either repair or replace products which prove to be defective The warranty does not apply to defects resulting from improper use or maintenance by the buyer from unauthorized modifications or operation outside the environmental specifications and from electrostatic discharge ESD For warranty service or repair the instrument should be sent to Advanced Laser Diode Systems in appropriate packing Please enclose a detailed fault report including instrument type and serial number s 1 2 Maintenance The instrument does not require special maintenance if it is used correctly 1 3 General Safety Considerations Before switching on the instrument make sure it has been properly grounded through the supplied AC power cable to a socket outlet with a protective earth contact Any interruption of the grounding can result in personal injury This instrument must be used under normal conditions and as specified otherwise the protection provided by the instrument could
11. electrical pulse of high amplitude variable pulse widths and a jitter of less than 3 4ps The following diagram illustrates the behavior and the relationship of electrical pumping current i carrier density n and photon density N ES ERE IN ELE S O S BE A N SAE EE SE E SF DG E EE G OS O EET 1 00 Nth pe Carrier ae Current i A 0 75 dens n 7 0 50 Photon dens N 0 25 oo 10 20 30 40 50 60 70 80 90 100 TIME arb u The diagram shows that an increasing pumping current increases the carrier density n At the carrier density threshold n a population inversion results in lasing emission from the laser diode If the pumping current is switched off shortly after this event the carrier density n drops below the threshold again This results in the emission of a single optical pulse Applying the pumping current i for a longer period would lead to the emission of multiple pulses These so called relaxation oscillations continue for a short time 0 5 to 2ns depending on the diode laser technology Rev 3 0 Dec 04 7 3 Operation 3 1 Installation Before installation check the setting of the mains voltage at the rear side of the instrument as any mismatch can cause damage to the instrument If the primary fuses are blown they can easily be replaced by the user A recommendation for a complete switch on procedure is given in the chapter Switch on procedure 3 2 Operation The digital control unit
12. ensceccesseeecensseeccenscecesssseccensaseseensneees 11 3 29 Troubleshooting sae n a r E E E E E renser eee 11 3 2 10 Switchon procedure sinice er ee n A Eea EE EE aA E EEDD aKo Naaa 11 A Optical Hedd rroen aE iA AAO Le 4 1 Handling and Adjustment e ssessosesscesocssocessoessosssocesosesocesocesocesocesocesocssscsssosesosesosesosesoessosss 12 4 1 1 System with collimating optics if ordered sesseseeseeseseerssesresressesresresrssesrrsresresresreeresrseresesres 12 4 1 2 System with removable fiber coupler and fiber if ordered eee eee eeeeese esse teeeteeeeseenseenes 13 4 1 3 System with internal fiber coupling if ordered eee ee cee ceseceeeeseeeeeeseeeaeeeseseseseeeseeeseeeas 15 4 2 Cleaning 02 scacsssetsseccscatecasstesdascsanbesoasstasessseenstsedendascsteosssonsssiestcnessssgedsscescesocusssaaseeosteoeteosssnessenes 15 5 General SpecificationS sessseesesseessoosesseessoosssseessooesssecesooesssoeesoosssseessooessseee L 5 1 Control Unit EIG1000D isiccissssccsicceseccsssscvsassiecesesedeisdoiesecesdbesecsteasiecesedeteentvensereesbeseooseessesnseseees 16 5 2 Optical Head Pil iiss siccccscscssstestssceesscssnssevscccoutscsentcesasesoeocsssuvesseseseesccssetestessdeoncssensevesesesonseses 16 6 Test Reports followed after blue Separation SNEet ccccsssccesrssessessccceseee 17 Rev 3 0 Dec 04 2 1 General The information given in this document is subject to change without notice Copyright Advan
13. g By slowly Rev 3 0 Dec 04 12 rotating the tool the inner tube is slightly moved longitudinal in the main housing After re focusing tighten the three screws again Please take care with the small screws 4 1 1 2 Micro Focus A micro focus can be used for focusing the collimated leaser beam to a small spot size in a certain distance in dependence of laser source distances and focal lengths The micro focus is inserted into the standard collimating optics and is fixed with three small slotted headless screws at the front end of the main housing of the optics 4 1 2 System with removable fiber coupler and fiber if ordered 4 1 2 1 Collimating optics The inner tube which holds the lenses is fixed to the main housing with two small hexagon headless screws in the middle For re focusing first loosen these screws and then insert the special adjusting tool with a small nose at one end in the right position from the front side of the main housing By slowly rotating the tool the inner tube is slightly moved longitudinal within the thread of the main housing After re focusing tighten the two screws again Please note that the base housing is different to the one used for systems with the standard collimating optics 4 1 2 2 Laser beam fiber coupler After collimating the laser beam with the collimating optics as described above you are ready to adjust the laser beam coupler for the fiber connector This could be necessary after removi
14. le fiber coupler and fiber internal fiber coupling fixed fiber 38 00 22 50 50 00 PR 700 00 120 00 gt Si __ M6 mounting thread 6 depth all units mm copyright Advanced Laser Diode Systems A L S GmbH 38 00 22 50 100 00 gt 146 10 Ss M6 mounting thread 6 depth 38 00 22 50 50 00 er 100 00 gt M6 mounting thread 6 depth 4 1 Handling and Adjustment The following chapters describe the main optics shown in the picture above that can be used in conjunction with PiLas systems You will find the optics used for your system in the PiLas test report attached to the manual 4 1 1 System with collimating optics if ordered 4 1 1 1 Standard collimating optics The inner tube which holds the lenses is fixed to the main housing with three small slotted headless screws in the middle For re focusing first loosen these screws and then insert the special adjusting tool with an eccentric aligning plug in the right position into the hole of the main housin
15. mum laser parameters can be read from the laser warning labels on top of the laser head and from the chapter Laser Safety in this manual Switch on the EIG1000D with key power switch The yellow power indicator LED should go on The system is preset with TUNE values for every frequency given in test report Select the desired frequency and press the stand by button to start the laser emission 9 Before changing to another frequency press the stand by button Press the MODE button until the frequency can be changed After the desired frequency is selected press the MODE button until the TUNE value is displayed Now switch on the laser emission by pressing the stand by button 10 Before power down the EIG1000D cancel the laser emission by pressing the stand by button The HEAD TRIGGERED LED goes out AON oo N Rev 3 0 Dec 04 11 4 Optical Head The optical head is electrically connected to the OUT connector 1 of the control unit with the cable PIL MH 01 Please attach the screws of the cable to the control unit and the optical head To fix the head mechanically please use the M6 thread in the base plane of the optical head Your system is supplied with the desired optical output option For detailed parameters please see the test report as a reference The standard head dimensions are shown in the following sketch There are three main versions collimating optics free space laser beam removable fiber coupling optics removab
16. ng the laser beam coupler from the main housing The laser beam coupler is fixed to the main housing with three small hexagon headless screws at the end of the main housing The first adjustment deals with the focus The inner tube of the laser beam coupler which holds the lenses is fixed to the housing with two small slotted headless screws in the middle For re focusing to the fiber connector first loosen these screws than insert the special adjusting tool with an eccentric aligning plug in the right position into the hole of the housing of the laser beam coupler By slowly rotating the tool the inner tube is slightly moved longitudinal in the main housing After re focusing tighten the two screws again The second adjustment deals with the optical axis The optical axis of the laser beam coupler is aligned to the optical axis of the collimated laser beam paraxial fiber coupling This is done by slightly adjusting the three hexagon head cap screws in conjunction with the three hexagon headless screws which are all located parallel to the optical axis After re aligning tighten all six screws again but be aware of the fact that these screws serve for aligning and tightening Please note that the fiber connector attached to the coupler is tightened with a small screw Before screwing off the fiber connector this small screw must be loosen The following may illustrate the procedure on hand of the usually applied 60SM Laser Beam Coupler
17. o optical heads set 1 corresponds to the optical head with the shorter wavelength and set 2 corresponds to the optical head with the longer wavelength The two sets of default TUNE values are programmed to an EPROM during the testing procedure at our facilities 3 2 9 Troubleshooting If an unreasonable value for any menu settings appears on the display please go to the TUNE DEFAULTS menu and press the UP or DOWN key Then switch the instrument off for at least 5 seconds and then back on again If the HEAD TRIGGERED LED goes out please switch off the instrument for at least 5 seconds and then back on again 3 2 10 Switch on procedure Chose a stable position for the setup of the EIG1000D and the laser head PiLxxx Ensure that the power key switch of the EIG1000D is in off position Connect the power supply cable to the EIG1000D Connect the laser head and the EIG1000D with the delivered control cable and fix the attachment screws of the SUB 25p plugs to the driver and the laser head We recommend fixing the controller cable and trigger cable to the workbench avoiding movement of the cables 5 Ensure the laser light will not harm any persons or other setups after switch on We recommend placing a non reflecting beam dump in front of the laser aperture 6 Provide your laser safety engineer with information about the delivered laser system and ask for laser safety measures like eye protective glasses The laser class as well as the maxi
18. of the PiLas is mainly operated by four keys UP DOWN MODE 3 and Stand by 8 You can switch between the different menus by pressing the MODE key The UP and DOWN keys are for selections within the menu itself The HEAD TRIGGERED light emitting diode LED 4 indicates pulse emission from the optical head After switching on the control unit you get the text message Advanced Laser Diode Sys Pulse Generator 3 2 1 Elements of the control unit 1 2 3 Ji A m Mui Laser bl de Systems HEAD TRIGGERED 0000000 TRIG IN TRIG OUT R l 5V Max 5V Max 500hm 1 Connection to optical head 2 Display illuminated 3 Keys for setting instrument UP DOWN MODE 4 Pulse emission indicator triggered condition 5 Power on indicator Rev 3 0 Dec 04 8 External trigger input connection Pre trigger output connection Key for setting Stand by mode o Oo NOQ Power switch 3 2 2 STATUS Menu TUNE 20 100 kHz SLOPE 7 1 40 V The STATUS menu shows the present state of the instrument for TUNE FREQUENCY TRIGGER SLOPE and TRIGGER LEVEL as described below You cannot select any item within this menu Press the Stand by key 8 to start or stop operation of the control unit The red controlling light inside the switch indicates the stand by condition By pressing the MODE key 3 multiple times you can switch to the different menus 3 2 3 FREQU
19. pot exactly on the fiber core measuring only some micrometers This is done by tightening the adjusting screws clockwise maximizing the coupled beam power and finally locking this status with the Allen head locking screws between them The coupler is delivered with pre adjusted lens Re focusing is done with the eccentric key Alignment of components The matching cylinder system with integrated circular V groove yields a form locking mutual connection of the singlemode components laser beam coupler anamorphotic beam shaping optic laser diode collimator By means of Allen head screws the components are locked in their optimal alignment In this way for instance the polarisation axis of the fiber is oriented to the polarisation direction of the laser beam source 4 1 2 3 Fiber collimator A fiber collimator can collimate the divergent output beam of the fiber Please insert the FC PC connector of the fiber gently in the right position watch the aligning plug to the reception of the collimator Only tighten it lightly Always use a protective cap for unused connectors or receptions in order to avoid damage to the optics and to the bare fiber end and to keep all parts clean Rev 3 0 Dec 04 14 The fiber connector can be fixed to the laser beam collimator with a small slotted headless screw This screw is located at the flattened end of the laser beam coupler and is pushing towards the outer metal sleeve of the FC PC connector 4
20. rigger output signal The signal ground shielding of the trigger input and output BNC connectors is isolated from chassis ground earth 5 2 Optical Head PiL Please see the attached test report for individual measurements and specifications Rev 3 0 Dec 04 16 6 Test Reports followed after blue separation sheet Rev 3 0 Dec 04 17
21. the front end of the main housing of the fiber collimator 4 2 Cleaning The need for cleaning of any precision optic should be reduced to a minimum by covering the optic and by use of a protective bag in order to avoid degrading We recommend that dust is blown off only Fingerprints need to be removed immediately with several steps of appropriate solvents such as alcohol Rev 3 0 Dec 04 15 5 General Specifications 5 1 Control Unit EIG1000D Internal trigger BEER Repetition rate 0 to 1 MHz in steps External trigger input BNC S Pre trigger output BNC o O optical output lt 4 ps for internal trigger typical external optical pulse depending on the source qualit is as ea Temperature drift trigger dela 10 ps K Mains input switchable at 115 V 10 60 Hz Environment operating also for the Optical Head Temperature 25 10 Relative humidit 30 to 70 Size of Control Unit 235 x 88 x 326 width x height x depth mm Size of Optical Head w o optics 74 x 38 x 100 width x height x depth mm Weight eee eee Control unit and head Notes The trigger output is DC coupled It provides a voltage source with a resistance of 50 Q Recommendation Check the maximum allowed voltage and the coupling condition of the input of an external instrument The trigger delay can be modified on request The optical output is synchronized to the rising slope of the pre t
22. trigger input 6 can be adjusted in three different ways There are two predefined trigger levels TTL and NIM with 1 40 V and 0 50 V respectively These are selected by pressing the UP or DOWN key The third option is the VAR setting In this setting you can modify the trigger level by first pressing the MODE key and then pressing the UP or DOWN key You will see the following display TRIGGERLEVEL modify The variable trigger level is stored after pressing the MODE key 3 2 6 TRIGGER SLOPE Menu The trigger slope is set to the rising positive or falling negative edge of the signal at the external trigger input 6 by pressing the UP or DOWN key 3 2 7 TRIGGER IMPEDANCE Menu TRIGGER IN 502 Rev 3 0 Dec 04 10 The input impedance of the external trigger input can be selected to 502 or 1 MQ by pressing the UP or DOWN key 3 2 8 TUNE DEFAULTS Menu TUNE DEFAULTS UP 1 DOWN 2 The TUNE DEFAULTS menu offers the option of resetting the instrument to the factory settings These factory settings correspond to the optimum TUNE value for achieving a single optical pulse at each frequency There are two sets of TUNE values available Set 1 is activated by pressing the UP key and set 2 is activated by pressing the DOWN key If the instrument is supplied with one optical head set 1 is programmed with the appropriate TUNE values and set 2 is programmed to 50 If the instrument is supplied with tw
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