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Summary of Contents for THORLABS DET20C2
- Page 1 DET20C2 InGaAs Biased Detector User Guide...
- Page 2 Common Operating Circuits ........... 9 Chapter 6 Troubleshooting ............. 11 Chapter 7 Specifications ..............12 7.1. Response Curve............13 7.2. Mechanical Drawing ............ 14 Chapter 8 Certificate of Conformance ........... 15 Chapter 9 Regulatory ............... 16 Chapter 10 Thorlabs Worldwide Contacts........17...
- Page 3 InGaAs Biased Detector Chapter 1: Warning Symbol Definitions Chapter 1 Warning Symbol Definitions Below is a list of warning symbols you may encounter in this manual or on your device. Symbol Description Direct Current Alternating Current Both Direct and Alternating Current Earth Ground Terminal Protective Conductor Terminal Frame or Chassis Terminal...
- Page 4 Chapter 2: Description Chapter 2 Description The Thorlabs DET20C2 is a ready-to-use, large area photo detector designed for detection of light signals ranging from 800 nm to 1700 nm. The unit comes complete with a photodiode and an internal 12 V bias battery enclosed in a rugged aluminum housing.
- Page 5 See Error! Reference source not found., page 7 to determine resistor values. Thorlabs sells a 50 Ω terminator (T4119) for best frequency performance and a variable terminator (VT2) for output voltage flexibility.
- Page 6 Depicted in Figure 1 is a junction photodiode model with basic discrete components to help visualize the main characteristics and gain a better understanding of the operation of Thorlabs' photodiodes. ��...
- Page 7 Please note that sensitivity values in the table are typical values; Thorlabs offers photodetectors with sensitivity ranges that vary from those shown below. Rev B, May 7, 2019...
- Page 8 InGaAs Biased Detector Chapter 4: Operations Dark Sensitivity Material Speed Cost Current (nm) Silicon (Si) 400 – 1000 High Germanium (Ge) 900 – 1600 High Gallium Phosphide (GaP) 150 – 550 High Indium Gallium Arsenide 800 – 1800 High (InGaAs) Extended Range: Indium 1200 –...
- Page 9 InGaAs Biased Detector Chapter 4: Operations �� ���� (2 �� × �� �������� �� 0.35 �� �� �� ���� 4.7. Terminating Resistance A load resistance is used to convert the generated photocurrent into a voltage ) for viewing on a voltage reading device, e.g., an oscilloscope. ��...
- Page 10 4.11. Battery Replacement Thorlabs delivers each DET with an A23 12 V battery. This battery is readily available at most retail stores, as well as through Thorlabs. The battery supplied will deliver about 40 hours with a 1 mA load, roughly equivalent to a continuous 1.5 mW light source with responsivity 0.6 A/W...
- Page 11 InGaAs Biased Detector Chapter 5: Common Operating Circuits Chapter 5 Common Operating Circuits Figure 2 Basic DET Circuit The DET Series Detectors are designed according the circuit depicted above. The detector is reverse biased to produce a linear response with applied input light.
- Page 12 InGaAs Biased Detector Chapter 5: Common Operating Circuits One can also use a photodetector with an amplifier for the purpose of achieving high gain. The user can choose whether to operate in Photovoltaic or Photoconductive modes. There are a few benefits of choosing this active circuit: ...
- Page 13 InGaAs Biased Detector Chapter 6: Troubleshooting Chapter 6 Troubleshooting Problem Suggested Solutions There is no signal response. Verify that the power is switched on and all connections are secure. Verify the proper terminating resistor is installed if using a voltage measurement device. Verify that the optical signal wavelength is within the specified wavelength range.
- Page 14 InGaAs Biased Detector Chapter 7: Specifications Chapter 7 Specifications All measurements performed at 25 °C ambient temperature, unless stated otherwise. Electrical Specifications Detector InGaAs Active Area Ø2.0 mm (3.14 mm Wavelength Range λ 800 nm to 1700 nm Peak Wavelength λ...
- Page 15 InGaAs Biased Detector Chapter 7: Specifications 7.1. Response Curve DET20C2 Responsivity 900 1000 1100 1200 1300 1400 1500 1600 1700 Wavelength (nm) Rev B, May 7, 2019 Page 13...
- Page 16 InGaAs Biased Detector Chapter 7: Specifications 7.2. Mechanical Drawing Visit the web for a more detailed mechanical drawing. Page 14 TTN134110-D02...
- Page 17 InGaAs Biased Detector Chapter 8: Certificate of Conformance Chapter 8 Certificate of Conformance Rev B, May 7, 2019 Page 15...
- Page 18 Waste Treatment is Your Own Responsibility If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site.
- Page 19 InGaAs Biased Detector Chapter 10: Thorlabs Worldwide Contacts Chapter 10 Thorlabs Worldwide Contacts For technical support or sales inquiries, please visit us at www.thorlabs.com/contact for our most up-to-date contact information. USA, Canada, and South America UK and Ireland Thorlabs, Inc. Thorlabs Ltd.
- Page 20 www.thorlabs.com...
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