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Summary of Contents for THORLABS DET Series
- Page 1 DET08C(/M) Free-Space Window Input InGaAs Biased Detector User Guide...
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Page 2: Table Of Contents
Specifications ..............11 6.1. Response Curve............12 6.2. Typical Response ............12 6.3. Mechanical Drawing ............ 13 Chapter 7 Troubleshooting ............. 14 Chapter 8 Certificate of Conformance ........... 15 Chapter 9 Regulatory ............... 16 Chapter 10 Thorlabs Worldwide Contacts........17... -
Page 3: Chapter 1 Warning Symbol Definitions
DET08C(/M) 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
DET08C(/M) Biased Detector Chapter 2: Description Chapter 2 Description The DET08C(/M) is a ready-to-use, high-speed InGaAs photodetector for use with NIR, free-space optical systems. This photodetector unit features a free- space lens input and includes 12 V bias battery, all in a compact aluminum housing. -
Page 5: Chapter 3 Setup
Select and provide a terminating resistor to the remaining end of the cable. See Chapter 4, page 7, to determine resistor values. Thorlabs sells a 50 Ω terminator (Item # T4119) for best frequency performance and a variable terminator (Item # VT2) for output voltage flexibility. -
Page 6: Chapter 4 Operation
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: Photoconductive
Photoconductive In photoconductive mode, a reverse external bias is applied, which is the basis for our DET series detectors. The current measured through the circuit indicates illumination of the device; the measured output current is linearly proportional to the input optical power. Applying a reverse bias increases the width of the depletion junction producing an increased responsivity and a decrease in junction capacitance: a linear response. -
Page 8: Junction Capacitance
DET08C(/M) Biased Detector Chapter 4: Operation The table below compares five common types of detector materials. Dark Sensitivity Material Speed Cost Current (nm) Silicon (Si) High 400 - 1000 Germanium (Ge) High 900 - 1600 Gallium Phosphide (GaP) High 150 - 550 Indium Gallium Arsenide (InGaAs) High 800 - 1800... -
Page 9: Terminating Resistance
DET08C(/M) Biased Detector Chapter 4: Operation 4.7. Terminating Resistance A load resistance is used to convert the generated photocurrent into a voltage ) for viewing on an oscilloscope: �� = �� × �� ������ ������ �������� Depending on the type of photodiode, the load resistance can affect the response speed. -
Page 10: 4.11. Battery Replacement
DET08C(/M) Biased Detector Chapter 4: Operation 4.11. Battery Replacement Thorlabs delivers each detector with an A23 12 V battery installed. This battery is readily available at most retail stores, as well as through Thorlabs. The supplied battery will deliver about 40 hours of operation with a 1 mA load, which is roughly equivalent to a continuous 1.5 mW light source at peak wavelength. -
Page 11: 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. The generated photocurrent is based upon the incident light and its wavelength and can be viewed on an oscilloscope by attaching a load resistance on the output of the detector. - Page 12 DET08C(/M) 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 of Photoconductive modes. There are a few benefits of choosing this active circuit: ...
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Page 13: Chapter 6 Specifications
DET08C(/M) Biased Detector Chapter 6: Specifications Chapter 6 Specifications All measurements are performed at 25 °C unless stated otherwise. Electrical Specifications Parameter Symbol Value Detector InGaAs PIN Active Area Diameter Ø80 µm λ Wavelength Range 800 to 1700 nm λ Peak Wavelength 1550 nm (λ... -
Page 14: Response Curve
DET08C(/M) Biased Detector Chapter 6: Specifications 6.1. Response Curve Typical Spectral Response 1.25 1.00 0.75 0.50 0.25 0.00 900 1000 1100 1200 1300 1400 1500 1600 1700 Wavelength (nm) 6.2. Typical Response Typical Pulse Response 200 400 600 800 1000 1200 1400 1600 1800 2000 Time (ps) Page 12 TTN020104-D02... -
Page 15: Mechanical Drawing
DET08C(/M) Biased Detector Chapter 6: Specifications 6.3. Mechanical Drawing Rev F, May 15, 2019 Page 13... -
Page 16: Chapter 7 Troubleshooting
DET08C(/M) Biased Detector Chapter 7: Troubleshooting Chapter 7 Troubleshooting Problem Suggested Solutions There is no signal response or Verify that the battery is inserted and has response is slower than sufficient power (>9 V). expected. Verify the proper terminating resistor is installed if using a Voltage measurement device. -
Page 17: Chapter 8 Certificate Of Conformance
DET08C(/M) Biased Detector Chapter 8: Certificate of Conformance Chapter 8 Certificate of Conformance Rev F, May 15, 2019 Page 15... -
Page 18: Chapter 9 Regulatory
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: Chapter 10 Thorlabs Worldwide Contacts
DET08C(/M) 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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