Quantum Instruments Cascade Laser Starter Kit Manual do Utilizador Página 1

Quantum Cascade LaserStarter KitInstructio ns Manual (Web versio n)CAUTIONBefore using the Quantum CascadeLaser Starter Kit, read thisdocumentation an

Starter Kit Instruction Manual General 9Note styleUsed when the p e rsonnel attention must be drawnto a particular ope ration or information.Example:N

Chapter 3Safety Instructions3.1 Chapter overviewThis chapter sets out safety instructions for ensur-ing safe and trouble- free operation of the system

Starter Kit Instruction Manual Safety Instructions 113.3 General safety instructions• Never attempt to use a system for purposesother than those detai

Chapter 4Description4.1 Chapter overviewThis chapter gives a basic description of the Quan-tum Cascade L aser Starter Kit system and its com-position.

Starter Kit Instruction Manual Description 134.3 DFB and FP Quantum Cascade Lasers4.3.1 DescriptionQuantum Cascade Lasers (Q C L ) are unipolar lasers

Starter Kit Instruction Manual Description 144.3.3 SpecificationsFar field elliptical (FWHM):Vertical: . . . . . . . . . . . . . . . . . . . . . . . . .

Starter Kit Instruction Manual Description 154.3.4 Electrical modelThe QCL can be modelised in a RC circuit.Electrical model characteristicsThe values

Starter Kit Instruction Manual Description 164.4 Laboratory Laser Housing(LLH100)4.4.1 DescriptionThe Laboratory Laser Housing is a Thermo-Electriccoo

Starter Kit Instruction Manual Description 17LLH100 internal viewThe Laboratory Laser Housing includes the follow-ing items:(1) LLH100 top cover(2) PE

Starter Kit Instruction Manual Description 184.4.3 Thermo-Electric Cooler (TEC)and PT100 connectionsThe pin 1 is recognised by a circle around it anda

Contents1 Identification 41.1 Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.2 Limited waranty .

Starter Kit Instruction Manual Description 194.4.4 Measurement connectionThese connections give access to the voltage on thelaser.The ”L” connection i

Starter Kit Instruction Manual Description 204.5 QCL pulser switching unit(LDD100)4.5.1 DescriptionThe switching unit is based o n dedicated powe rMOS

Starter Kit Instruction Manual Description 214.6 QCL pulse switching measuring unit4.6.1 GeneralitiesThe measuring circuit c ontained in the LDD100pro

Starter Kit Instruction Manual Description 22Duty cycle calculationUPI can be used to c alculate the duty factor asfollows:df =2UP I−νP lowνP high−νP

Starter Kit Instruction Manual Description 234.6.5 Laser peak voltageThe laser peak voltage is given by:Upeak= 2ULH − U LLpeakwhere U LLpeakis the cor

Starter Kit Instruction Manual Description 244.7 QCL pulser timing un it (T P G128)4.7.1 DescriptionThe QCL pulser timing unit is designed to controlt

Starter Kit Instruction Manual Description 254.8 QCL temperature controller(TCU151)4.8.1 DescriptionThe TC U151 is used to control the las e r’s tempe

Chapter 5Installation5.1 Chapter overviewThis chapter describes the installation and the con-nection of the QCL Starter Kit. It a lso ex plains theope

Starter Kit Instruction Manual Installation 275.4 Setting the appropr iate ACvoltage on TCU151The TCU151 temperature controller works on 110/120Vor 22

Starter Kit Instruction Manual Installation 285.5 Installing the starter Kit5.5.1 Before beginningMake sure that the following devices are turnedOFF:•

24.6.5 Laser peak voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234.6.6 Avera ge dissipation . . . . . . . . . . . .

Starter Kit Instruction Manual Installation 29[3] Plug the cable (3) onto the LDD100(4).[4] Plug the +12VDC co nnector (1) into theTPG128 (9).[5] Plug

Chapter 6Use6.1 Chapter overviewThis chapter describes how to use the QCL StarterKit. It also explains the functionalities of the TPG12 8and the Tempe

Starter Kit Instruction Manual Use 316.3 TCU151 command descriptionThe internal temperature of the LLH100 is drivenby the TCU151 unit.The Temperature

Starter Kit Instruction Manual Use 326.4 Laser utilisation6.4.1 OverviewIn order to insure a correct use and and an appropri-ate lifetime to the laser

Starter Kit Instruction Manual Use 33[5] Turn the TPG128 ON (8) and set the pulseperiod to 2.0 and the range to 0.5 to 10.5 µs(medium), corresponding

Starter Kit Instruction Manual Use 346.5 Interlock utilisationThe temperature controller is designed with an built-in interlock (1). This function is

Chapter 7Troubleshooting7.1 Chapter overviewThis chapter sets out troubleshooting instructionsfor ensuring safe and trouble-free operation of theQuant

Starter Kit Instruction Manual Troubleshooting 36Laser draws current but gives nolight- The laser may be reversed polarized (itis not a desirable situ

Chapter 8Maintenance8.1 OverviewThis chapter describes all procedures of mainte-nance and calibration for the QCL starter Kit. Theprocedures described

Starter Kit Instruction Manual Maintenance 388.2 Replacement procedures8.2.1 Quantum Cascade Laser replace-mentBefore beginning[1] Switch the QCL Star

310 Appendix 5510.1 Bias Circut (”Bias-T”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5510.1.1 General . . . . . . .

Starter Kit Instruction Manual Maintenance 39[4] Install the new laser (4) into the holderusing small tweezers ( 0.5cm aperture).[5] Hold the laser (4

Starter Kit Instruction Manual Maintenance 408.2.2 QCL ”UP” and ”DN” positionexchangeBefore beginning[1] Switch the QCL Starter Kit OFF.Material neede

Starter Kit Instruction Manual Maintenance 41[5] Place the sc rews (3) in the PET holder (4).[6] Place the PET holder (4) on the two guides(5) on the

Starter Kit Instruction Manual Maintenance 428.3 TCU151 temperature c on-troller interlock setting8.3.1 GeneralitiesThe interlock is located on the ma

Starter Kit Instruction Manual Maintenance 438.4 Calibaration procedures8.4.1 TPG128 calibrationGeneralitiesThe present section describes procedure to

Starter Kit Instruction Manual Maintenance 44[5] Choose the r ange 5 µs to 105 µs. Pot 10turns Period on 10. Adjust the adjustablecapacitor max 105 µs

Starter Kit Instruction Manual Maintenance 45[12] Connect oscilloscope on the output Out1.Load with a 50Ω . Choose a repetition periodof about 5 µs.[1

Starter Kit Instruction Manual Maintenance 468.4.2 TCU151 temperature controllercalibration! WARNING ! Kee p in mind that duringthe calibration proced

Starter Kit Instruction Manual Maintenance 47Sensing level and range adjustement[4] Replace the cable connected to J8 (4) withthe 100Ω 1% reference re

Starter Kit Instruction Manual Maintenance 48Temperature Reference offset adjustment[10] Adjust B13 (3) to 0.000 with P3 (4)[11] Set the temperature wi

Chapter 1Identification1.1 DocumentQuantum Cascade Laser Starter Kit Instructions Manual.Web Version 3.1 02.07ManufacturerAlpes Lasers SA1-3 Passage Ma

Starter Kit Instruction Manual Maintenance 49Oscillator check[15] Measure the frequency on the pin 7 ofU13 (1).Note: The value is 28KHz + /- 3KHzCurre

Starter Kit Instruction Manual Maintenance 50CAUTION ! For the further steps of thischeck, limit the positive current to 1 A andthe negative one with

Starter Kit Instruction Manual Maintenance 51Current adjustment[28] Set the selector (3) to mode Setting◦Cand adjust the temper ature value to 25◦Cby

Starter Kit Instruction Manual Maintenance 52Miscellaneous functions testing Temperaturelimit testing[37] Decrease the temperature limit thresholdfrom

Chapter 9Application notes9.1 Detection techniques9.1.1 Direct absorptionIn a direct absorption measurement, the change inintensity of a beam is recor

Starter Kit Instruction Manual Maintenance 549.1.3 Photoacoustic detectionIn the photoaco us tic detection, the optical beam isperiodically modulated

Chapter 10Appendix10.1 Bias Circut (”Bias-T”)10.1.1 GeneralThe Bias-T allows to apply a constant (DC) cur-rent to the las e r in addition to the pulse

Starter Kit Instruction Manual Appendix 5610.1.3 SpecificationsBias frequency . . . . . . . . . . . . . . . . Up to 100 HzAchievable shift . . . . . .

Starter Kit Instruction Manual Appendix 57Dangers and dis advantages of using a Bias-Tcircuit• Since a Bias-T only allows to heat the laser,the emissi

Starter Kit Instruction Manual Appendix 58• As a rule of thumb, the overall dissipated power(sum of DC Bias current dissipation and pulsecurrent dissi

Chapter 2General2.1 Chapter overviewThis chapter gives basic information on system func-tions, specifications and doc umentation.2.2 GeneralitiesThe in

Starter Kit Instruction Manual Appendix 5910.2 Unpacking NS laser fromits transportation boxFig.54: Unpacking instructions for NS submounts

Starter Kit Instruction Manual General 62.4 GlossaryThe following terms, among others, a re used in thisInstructions Manual.2.4.1 PersonsPersonnelPers

Starter Kit Instruction Manual General 72.5 Typographic c onventionsThe following styles are used in this manual.Description styleThis style, used in

Starter Kit Instruction Manual General 8Procedure effects styleThe proc e dure effects are described by using thefollowing symb ol ,→.Example:[1] Click