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THORLABS DET36A2, User Manual

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THORLABS DET36A2 User Manual Download Page 15

Si Biased Detector

 

Chapter 7: Specifications 

Rev A, December 27, 2017 

Page 13 

7.1. Response Curve 

 

350

500

650

800

950

1100

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

DET36A2 Responsivity

 

Resp

onsivit

y (

A

/W)

Wavelength (nm)

Summary of Contents for DET36A2

Page 1: ...DET36A2 Si Biased Detector User Guide...

Page 2: ...4 5 Junction Capacitance 6 4 6 Bandwidth and Response 6 4 7 Terminating Resistance 7 4 8 Shunt Resistance 7 4 9 Series Resistance 7 4 10 Battery Check 7 4 11 Battery Replacement 8 Chapter 5 Common Ope...

Page 3: ...ol Description Direct Current Alternating Current Both Direct and Alternating Current Earth Ground Terminal Protective Conductor Terminal Frame or chassis Terminal Equipotentiality On Supply Off Suppl...

Page 4: ...l 12 V bias battery enclosed in rugged aluminum housing The DET36A2 includes a removable 1 optical coupler SM1T1 providing easy mounting of ND filters spectral filters fiber adapters SMA FC and ST sty...

Page 5: ...tor values Thorlabs sells a 50 terminator T4119 for best frequency performance and a variable terminator VT2 for output voltage flexibility Note the input impedance of your measurement device since th...

Page 6: ...the level of the output current to expect and the responsivity based upon the incident light Depicted in Figure 1 is a junction photodiode model with basic discrete components to help visualize the ma...

Page 7: ...tage builds up This mode of operation exploits the photovoltaic effect which is the basis for solar cells 4 4 Dark Current Dark current is leakage current which flows when a bias voltage is applied to...

Page 8: ...of the RC circuit Drift time tdf Time for electron hole pairs to move from the depletion zone to the electrodes The depletion zone has an intrinsic electric field that accelerates the charges so that...

Page 9: ...may range from the order of ten to thousands of M and is dependent on the photodiode material For example an InGaAs detector has a shunt resistance on the order of 10 M while a Ge detector is in the...

Page 10: ...late the bias voltage more precisely using this feature then a high impedance load is suggested 4 11 Battery Replacement Thorlabs delivers each DET with an A23 12 V battery This battery is readily ava...

Page 11: ...sed to produce a linear response with applied input light The photocurrent generated is based upon the incident light and wavelength and can be viewed on the oscilloscope by attaching a load resistanc...

Page 12: ...cross the photodiode since point A is held at the same potential as point B by the operational amplifier This eliminates the possibility of dark current Photoconductive mode The photodiode is reversed...

Page 13: ...ll have a 1 M input impedance For visible detectors point the detector toward a fluorescent light and verify that a 60 Hz 50 Hz outside the US signal appears on the scope If so the device should be op...

Page 14: ...heck Switch Momentary Pushbutton Output BNC DC Coupled Package Size 2 79 x 1 96 x 0 89 70 9 mm x 49 8 mm x 22 5 mm PD Surface Depth6 0 09 2 2 mm Weight 0 10 kg Accessories SM1T1 Coupler SM1RR Retainer...

Page 15: ...i Biased Detector Chapter 7 Specifications Rev A December 27 2017 Page 13 7 1 Response Curve 350 500 650 800 950 1100 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 DET36A2 Responsivity Responsivity A W Wavelength n...

Page 16: ...Si Biased Detector Chapter 7 Specifications Page 14 TTN134189 D02 7 2 Mechanical Drawing Visit the web for a more detailed mechanical drawing...

Page 17: ...Si Biased Detector Chapter 8 Certificate of Conformance Rev A December 27 2017 Page 15 Chapter 8 Certificate of Conformance...

Page 18: ...abs products such as Pure OEM products that means assemblies to be built into a unit by the user e g OEM laser driver cards Components Mechanics and optics Left over parts of units disassembled by the...

Page 19: ...nada and South America Thorlabs Inc sales thorlabs com techsupport thorlabs com Europe Thorlabs GmbH europe thorlabs com France Thorlabs SAS sales fr thorlabs com Japan Thorlabs Japan Inc sales thorla...

Page 20: ...www thorlabs com...

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