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Related Manuals for THORLABS DET50B
Summary of Contents for THORLABS DET50B
- Page 1 DET50B Ge Biased Detector User Guide...
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Page 2: Table Of Contents
Chapter 7 Specifications ..............13 7.1. Response Curve ............14 7.2. Mechanical Drawing ..........15 Chapter 8 Certificate of Conformance ..........16 Chapter 9 Regulatory ................ 17 Chapter 10 Thorlabs Worldwide Contacts ........18 Page 1 Rev G, July 12, 2012... -
Page 3: Chapter 1 Warning Symbol Definitions
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 Equipotentiality... -
Page 4: Chapter 2 Description
Ge Biased Detector Chapter 2 Description The Thorlabs DET50B is a biased, Germanium (Ge) detector designed for detection of light signals over 800 to 1800 nm range. The unit comes complete with a photodiode and internal 12 V bias battery enclosed in rugged aluminum housing. -
Page 5: Chapter 3 Setup
Failure to do so may cause damage to the diode and or the fiber. An easy way to accomplish this is to install a SM1RR retaining ring (included with the DET50B) inside the 1" threaded coupler before installing the fiber adapter Apply a light source to the detector. -
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: Dark Current
Chapter 4: Operation Photoconductive In photoconductive mode, an external reverse 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. -
Page 8: Junction Capacitance
Ge Biased Detector The table below gives some advantages to each common type of detector material. Dark Sensitivity Material Current Speed (nm) Cost Silicon (Si) High 400 – 1000 Germanium (Ge) High 900 – 1600 Gallium Phosphide (GaP) High 150 – 550 Indium Gallium Arsenide High 800 –... -
Page 9: Terminating Resistance
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 the photodiode, load resistance can affect the response speed. For maximum bandwidth, we recommend using a 50 Ω coaxial cable with a 50 Ω... -
Page 10: Battery Replacement
= 1050 4.11. Battery Replacement Thorlabs delivers each DET with an A23 12 V battery installed. 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 at peak wavelength. -
Page 11: Chapter 5 Common Operating Circuits
Chapter 5: Common Operating Circuits Chapter 5 Common Operating Circuits RC Filter External Protection Diode Photodetector Voltage Resistor V Bias Regulator 1 kΩ On/Off Switch LOAD Capacitor 0.1 µF Battery 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 Ge Biased Detector 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 Troubleshooting
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: Chapter 7 Specifications
Ge Biased Detector Chapter 7 Specifications All measurements performed with a 50 Ω load unless stated otherwise. Electrical Specifications Detector Ge PIN Active Area Ø5 mm (19.6 mm Wavelength Range λ 800 to 1800 nm Peak Wavelength λ 1550 nm Peak Response 0.85 A/W ℜ( λ... -
Page 15: Response Curve
Chapter 7: Specifications 7.1. Response Curve 13124-S01 Page 14... -
Page 16: Mechanical Drawing
Ge Biased Detector 7.2. Mechanical Drawing Visit the web for a more detailed mechanical drawing. 48.0 mm 26.2 mm 1.89 in 1.03 in 43.2 mm #8-32 x 0.25" Thread 1.70 in (M4 x 6.35mm for -EC) 16.2 mm 0.64 in Power Switch 53.3 mm 70.1 mm... -
Page 17: Chapter 8 Certificate Of Conformance
Chapter 8: Certificate of Conformance Chapter 8 Certificate of Conformance 13124-S01 Page 16... -
Page 18: Chapter 9 Regulatory
9.1. 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
Chapter 10: Thorlabs Worldwide Contacts Chapter 10 Thorlabs Worldwide Contacts USA, Canada, and South America Thorlabs, Inc. 56 Sparta Avenue Newton, NJ 07860 Tel: 973-300-3000 Fax: 973-300-3600 www.thorlabs.com www.thorlabs.us (West Coast) Email: sales@thorlabs.com Support: techsupport@thorlabs.com Europe UK and Ireland Thorlabs GmbH Thorlabs Ltd. - Page 20 .thorlabs.c c om...
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