MDL 002
User Manual: MDL-002
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INSTRUMENTS
ModUlESoCT PRodUCTS
SPECIal PolaRIzaTIoN
CoMPoNENTS
aCCESSoRIESaPPlICaTIoN GUIdE
FaQS INSTRUMENTS
General Photonics Corporation 909.590.5473 www.generalphotonics.com
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General Photonics’ motorized variable optical delay line provides precision
opticalpathlengthadjustmentofupto560ps,single-pass.Drivenby
aDCmotorwithanintegratedencoder,theMDL-002hasadelay
resolutionoflessthan0.3µm(1fs),andanextremelylowbacklash
oflessthan8fs.Inaddition,itsadvancedmotiondesignguarantees
longevityforlong-termcontinuousoperation.Lowinsertionloss
and high reliability make this device ideal for integration in optical
coherencetomography(OCT)systems,networkequipmentandtest
instrumentsforprecisionopticalpathlengthcontrolortimingalignment.TheMDL-
002isavailableinthreeconfigurations:1)anintegratedunitforuseasabench-topinstrumentfor
laboratoryapplications,2)withtheopticalheadandcontrolunitseparatedforeasyincorporation
intootherequipment,and3)anOEMversionwithaminiaturecontrollerboard.Allthreeversions
canberemotecontrolledbyaPCoramicro-processorthroughanRS-232interface.Thedelayline
isavailablewitheithersinglemodeorPMfiberpigtails.
Features:
. Compact
.Highresolution
.Lowbacklash
.Lowinsertionloss
.Highstability
.Highestdelaytolengthratio
.Longdelay:morethan560ps
Applications:
.OpticalCoherenceTomography
(OCT)
.OpticalFourierspectrumanalysis
. Optical interferometry
.Delaygenerationandmeasurement
. Optical time division multiplexing
(OTDM)
.Fibersensors
Tech Info: p. 215
FAQ: p. 227
Timing/Delay Modules
Motorized Variable Optical Delay Line – VariDelay™ II
Specifications:
OperatingWavelength1SM:1260to1650nm
PMordouble-pass:1310±50or1550±50nm
OpticalDelayRange2
0–330ps(single-passmodel)
0–560ps(single-passmodel)
0–1120ps(double-passmodel)
OpticalDelayResolution 0.3µmor1fsperencodercount(single-pass)
0.6µmor2fsperencodercount(double-pass)
OpticalDelayAccuracy ±0.01psor±3µm(single-pass)
±0.02psor±6µm(double-pass)
OpticalDelayRepeatability ±0.01psor±3µm(single-pass)
±0.02psor±6µm(double-pass)
InsertionLoss 1.0dBnominal(single-pass)
1.5dBnominal(double-pass)
InsertionLossVariation
±0.3dBoverentirerangefor330psmodels
±0.5dBoverentirerangefor560psmodel
±0.7dBoverentirerangefor1120psmodel
PDL 0.1dBmaxforsingle-modefiber
ReturnLoss 50dB
ExtinctionRatio >18dBforPMmodel
OpticalDamagePowerThreshold 300mW
PowerSupply 12VDC/1Amax.
ControlMode PanelkeypadandRS-232interface
Display 2x16characterLCD
OperatingTemperature 0°Cto40°C
StorageTemperature -20°Cto60°C
FiberType SMF-28orPMPandafiber
Dimensions
(ControlUnit/IntegratedVersion)
330psmodel:1.6”(H)×4”(W)×7”(L)
560psor1120psmodels:1.6”(H)×4.4”(W)×9”(L)
Dimensions
(MiniControllerBoard) 2.56”(L)×2.56”(W)×0.85”(H)
Dimensions(OpticalHead) 330psmodel:0.7”(H)x1.46”(W)×5.20”(L)
560psor1120psmodels:0.7”(H)x1.46”(W)x6.18”(L)
Notes:Values in table are valid over a 1310 ± 50 or 1550 ± 50nm range for a device without connectors.
1.Otherwavelengths,suchas1064nm,alsoavailable.
2.The1120psmodelisadouble-passdevice.Sinceinputandoutputsignalstravelonthesamepigtail,a
circulatororPBSmaybenecessarytoseparateinputandoutputsignalsforsomeapplications.

INSTRUMENTS
ModUlESoCT PRodUCTSSPECIal PolaRIzaTIoN
CoMPoNENTS
aCCESSoRIESaPPlICaTIoN GUIdEFaQS INSTRUMENTS
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General Photonics Corporation 909.590.5473 www.generalphotonics.com
TypicalPerformanceData:
Figure1.Insertionlossvs.opticaldelay.
Dimensions:(Representativedrawings:560psversion)
Optical head: Integratedversion/controlunit
OrderingInformation:
MDL—002— — — —
Wavelength:
13 = 1310 nm
15 = 1550 nm
35=1310&1550nm
DelayRange:
33 = 330 ps
56=560ps
11=1120ps
ConnectorType:
FC/PC,FC/APC
SC/PC,SC/APCor
NC=noconnectors
Others specify
SS=SMF-28
PP=PMPanda
Configuration:
I =integrated
D=Remotehead/
standard controller
O=Remotehead/
mini controller board
—
Note:
1.ForSMpigtails,thedefaultconfigurationis3mmjacketed.ForPMpigtails,thedefault
configurationis900µmloosetubejacketed.
2.Wavelength:35option(dualwindow1310/1550nm)isavailableonlyforSMsingle-pass
devices(330and560ps).PMordouble-passdevicesaresingle-window(1310or1550nm)
only.
Timing/Delay Modules
Motorized Variable Optical Delay Line – VariDelay™ II