THORLABS LDM21 Manual de usuario







LDM21(/M)

5.6mm/9mm

LaserDiodeMount



UserGuide











TableofContents

Chapter1



Safety...................................................................1



Chapter2



Description...........................................................2



Chapter3



Setup....................................................................3



3.6.1



TheoreticalResistanceValues............................................10



Chapter4



Operation...........................................................12



Chapter5



Troubleshooting.................................................14



Chapter6



Specifications.....................................................16



Chapter7



MechanicalDrawing...........................................17



Chapter8



WarrantyandRMAInformation.........................18



Chapter9



ThorlabsWorldwideContacts............................19



5.6mm/9mmLaserDiodeMount Chapter1:Safety

Rev.L,March23,2023  Page1

Chapter1 Safety



Warning

This unit must not be operated in explosive

environments.



Warning

Avoidexposure–laserradiationemittedfromapertures



5.6mm/9mmLaserDiodeMount Chapter2:Description

Page2  TTN013394‐D02

Chapter2 Description

TheLDM21(/M)isatemperature‐controlled laser diode mount. When

usedwithThorlabsLDCSeriesLaserControllersandTEDSeriesTEC

Controllers, a laser diode can be operated with precise temperature

controlforwavelengthandpowerstability.Afourpinsocketacceptsall

9mmand5.6mmlaserdiodes.Easytousepolarityswitchesallowthe

lasermounttobeconfiguredforallpossiblelaserpinassignments.

TheLDM21(/M)wasdesignedwithfeaturesthatallowittobeeasily

incorporatedintocomplexsystems.ThefrontoftheLDM21(/M)hasan

SM1(1.035"‐40)threadtoacceptawide variety of Thorlabs SM11.0"

opticsmountsandaccessories.Alsostandardwiththemountare4‐40

tappedholeson 30mmcentersformountinganynumberofThorlabs

cageassemblyproducts.Therearealsofour8‐32(M4x0.7)tappedholes

toallowtheunittobepostmounted.

TheLDM21(/M)usesathermo‐electriccooler(TEC)topreciselyregulate

the operating temperature of a laser diode. Temperature sensingis

accomplished using an integrated thermistor and AD592 solid state

temperaturesensor.TheThorlabsTED200Csupportsthesesensors.

NOTE:TheLDM21(/M)isintendedforlaserdiodesrequiringlowinput

power and operating across a limited temperature range.  Its primary

functionis tomaintainthelaserdiode casetemperatureataconstant

temperature to within 0.2 °C, ideally at 25 °C in a typical laboratory

ambientenvironment(20to30°C).PleaserefertotheSafeOperating

AreachartinthismanualtoensurethattheLDM21(/M)isusedwithinits

capabilities.



Figure1 InsideViewofLDM21andIncludedComponents

5.6mm/9mmLaserDiodeMount Chapter3:Setup

Rev.L,March23,2023  Page3

Chapter3 Setup

LaserInstallation

1. Unpackthelasermountandremovethefour2‐56socket‐head

screwsfromthefrontcoverusinga5/64"hexdriver(provided).

2. Remove the two Phillips head 2‐56 screws from the laser‐

mountingflangeandremovetheflange.

3. Determine the laser pin configuration from the laser diode

manufacturer’sdatasheetsandsettheLD(LaserDiode)andPD

(Photodiode)switcheslocatedontheinsideoftheunitaccording

toFigure2.



Figure2 PolaritySwitchSettings

Style A

Style B

Style C

Style D

AG CG

CG AG

AG CG

CG AG

AG CG

CG AG

AG CG

CG AG

Case

LD PD

Case

5.6mm/9mmLaserDiodeMount Chapter3:Setup

Page4  TTN013394‐D02

 The four sockets comprising the laser diode connector are

through‐hole type sockets with a blind clearance of 0.48”

(1.22cm)measuredfromthefrontfaceofthecoppercoldplate.

Itisnotnecessarytotrimthelaserdiodeleadspriortomounting

intothisconnectorunlesstheyarelongerthan0.48”(1.22cm).

 Thelaserconnectorislocatedcloseenoughtothefrontfaceof

thecoppercoldplatetoalloweasyinstallationofshort‐leaded

lasers. The clearance area around the LD and PD sockets is

sufficienttopreventthepinsfromcontactingthecoldplate.

 Mostlaserdiodesarethreepinswiththecasetiedtooneofthe

laserpinsandalsotooneofthephotodiodepins.Theotherlaser

and photodiode pins will be isolated from the case. The

LDM21(/M) was designed to operate the laser case at ground

potential,thereforethiscommonpinwillbeinsertedintoeither

the12o’clockorthe6o’clockpositionofthelaserconnector.

Locatetheisolatedlaserpinandinsertitinthe3o’clockposition.

Theisolatedphotodiodeshouldnowbeinthe9o’clockposition.

Refer to Fig. 3. (Orient the mount with the PD polarity switch

abovetheLDsocket).

 TheLDM21(/M)MountisalsocompatiblewithstyleEandstyle

Hlaserdiodes,whichdonothaveaphotodiode;theyhaveonly

alaserdiodeandagroundpin.Theycanthereforebesetupthe

same as style A (LD Anode Ground) or style B (LD Cathode

Ground)respectively.

 Replace the laser mounting flange and the cover. Install both

screwsthroughthemountingflangeandlooselyintothemount.

Carefullytighteneachscrewalittlebitatatimeuntiltheflange

isjustsnug.Donotover‐tighteneitherscrew‐theflangeshould

sitslightlyabovethecoldplate.Reinstallthecoverusingthefour

2‐56capheadscrewsprovided.

5.6mm/9mmLaserDiodeMount Chapter3:Setup

Rev.L,March23,2023  Page5



Figure3 LDandPDOrientation

5.6mmAdapter

Bydefault,theLDM21(/M)isdesignedtobeusedwithstandard9mm

laserdiode packages.Themountcanbeusedwithastandard 5.6mm

using the included adapter, which can be found in the small brown

envelopemarked“Accessories”ontheoutside.Includedinthisenvelope

isthe9mmmountingplateandtheimperialtometricmountingadapter.

4‐PinLaserDiodes

TheLDM21(/M)alsosupports4‐pinlaserdiodes.Insertthelaserintothe

4‐pinsocketandnotewhichlaserpinisinthe3o’clockposition(laser

anodeorcathode). Also note whichphotodiode pin is inthe9 o’clock

position(anodeorcathode).Themountwilltiethelaserandphotodiode

pinslocatedat12o’clockand6o’clocktogetherandalsotoground.By

notingwhichpolaritypinsareinsertedintothesocket,youcanconvert

the4‐pinlayouttooneofthe3‐pinlayoutsinFigure2onpage3.Setthe

LDandPDpolarityswitchesaccordingly.



LDPD

5.6mm/9mmLaserDiodeMount Chapter3:Setup

Page6  TTN013394‐D02

LaserControllerConnections

UsingtheThorlabsLDC/ITCSeriesLaserControllers:

 TheLDM21(/M)iscompatiblewithallThorlabsLDCLD

controllersandITCseriescombinationcontrollers(LDandTEC).

Appropriate cables with DB9 connectors are included with

Thorlabs controllers and ensure that the controllers cannot be

connectedincorrectly.Additionally,thesecontrollershavebuilt‐

inprotectioncircuitrythatprotectsthelaserwhennotinuse.

 ThenomenclaturefortheLaserDiodepolarityswitchonthe

LDC/ITC driver and the LDM21(/M) are consistent with each

other.Forexample,ifthelaserpolarityonthedriverissetto

“AG” (anode grounded), then the LD polarity switch on the

LDM21(/M)shouldalsobesettoAG,andsoforth.

 ThenomenclatureforthePhotoDiodepolarityswitchonthe

LDC4000SeriesBenchtopControllers,PRO8LaserDiodeCurrent

ControlModules,andITCseriesdriversandtheLDM21(/M)isas

follows:ThephotodiodepolarityswitchontheLDM21(/M)must

alwaysbesetto“CG”.Thephotodiodepolarityshouldbesetwith

theinternalLasercontrollerswitchonly.Formoreinformation

onhowtosetPolaritysettingsontheLasercontroller,please

refertotheappropriateLaserControllermanual.

Usingathird‐partylasercontroller:

 Whenusingathird‐partycontroller,acustomcablewillhaveto

bemadetoproperlyinterfacetothelasermount.Pleasereferto

thetableonthenextpageforlaserconnections:



Otros manuales para LDM21

Este manual sirve para los siguientes modelos

Tabla de contenidos

Otros manuales de Equipo de iluminación de THORLABS

THORLABS

THORLABS SLS203L Manual de usuario

THORLABS

THORLABS PSY240E Manual de usuario

THORLABS

THORLABS LEDD3 Series Manual de usuario

THORLABS

THORLABS HPLS343 Manual de usuario

THORLABS

THORLABS SLS303 Manual de usuario

THORLABS

THORLABS CHROLIS Manual de usuario

THORLABS

THORLABS SLS205 Manual de usuario

THORLABS

THORLABS M365L1 Manual de usuario

THORLABS

THORLABS SLS401 Manual de usuario

THORLABS

THORLABS S5FC Series Manual de usuario

THORLABS

THORLABS OSL2 Manual de usuario

THORLABS

THORLABS DC3100 Series Manual de usuario

THORLABS

THORLABS M405LP1 Manual de usuario

THORLABS

THORLABS BC106-VIS Manual de usuario

THORLABS

THORLABS LED4C Series Manual de usuario

THORLABS

THORLABS MCWHF2 Manual de usuario

THORLABS

THORLABS SLS201L Manual de usuario

Manuales populares de Equipo de iluminación de otras marcas

Brizo

Brizo 8SP-MU-4 Manual de usuario

LUCE&LIGHT

LUCE&LIGHT BROM 1.0 Manual de usuario

IKEA

IKEA BJÖRKSPIREA Manual de usuario

Laserworld

Laserworld Evolution Series ES-400RGB Manual de usuario

Alien

Alien RG STAR Manual de usuario

EuroLite

EuroLite LED B-40 Manual de usuario

Qazqa

Qazqa Suplux SL 3 Black 103062 Manual de usuario

Commercial Electric

Commercial Electric 54568141 Manual de usuario

CREE LIGHTING

CREE LIGHTING 304 Series Manual de usuario

Goobay

Goobay 49867 Manual de usuario

ECOMAN ITALIA

ECOMAN ITALIA LED T8 Manual de usuario

Alkalite

Alkalite Krypton KT-81 Manual de usuario

Clas Ohlson

Clas Ohlson GU10 Manual de usuario

DTS

DTS DELTA 10 F Manual de usuario

ring

ring Solar Steplight Manual de usuario

One Stop Gardens

One Stop Gardens 57696 Instrucciones de montaje

Chauvet DJ

Chauvet DJ COREpar UV120 ILS Manual de usuario

SIREM

SIREM Swimeo A2 Manual de usuario