Avalanche Photodetector, InGaAs, Fixed Gian, fiber-coupled,800-1700nm

APD20 Series Avalanche Photodetector, FC Interface, SMA Output, High Gain, Ultra Weak Laser Detection, 20M-400MHz Bandwidth.

The picture of the avalanche photodetector
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  Avalanche Photodetector (APD) Module is a highly sensitive detector with a high gain, low noise, and temperature compensation feature. It features fiber-optic coupled input and analog signal output with a bandwidth range of 20M-400M. The module is ideal for applications such as weak light detection and fiber optic sensing systems.


  M-factor temperature compensation
  APD overcurrent protection
  Low noise and high gain
  All metal shell, excellent shielding performance
  M6 threaded hole for easy installation


  Detects ultra-weak light signals
  Detect fast laser pulses
  Fiber optic sensing system
  Fiber Optic Communications & Fiber Optic Sensing

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APD20-400M APD20-200M APD20-50M APD20-10M
material InGaAs InGaAs InGaAs InGaAs
Wavelength Range 1000-1700nm 1000-1700nm 1000-1700nm 1000-1700nm
Responsiveness 18A/W @ 1550nm (M = 20) 18A/W @ 1550nm (M = 20) 18A/W @ 1550nm (M = 20) 18A/W @ 1550nm (M = 20)
Bandwidth DC-400MHz DC-200MHz DC-50MHz DC-10MHz
Rise Time 0.9ns 1.8ns 9ns 36ns
Conversion Gain(Max)@HiZ 1.8x105 V/W 4.0x105 V/W 2.0x105 V/W 9.8x106 V/W
Minimum optical power@1550nm 40nW(RMS) 21nW(RMS) 5.5nW(RMS) 2.3nW(RMS)
Saturated optical power @1550nm 16.7uW 7.5uW 1.5uW 0.3uW
Operating voltage 9 - 12VDC 9 - 12VDC 9 - 12VDC 9 - 12VDC
Operating current <200mA <200mA <200mA
Noise voltage <18mVpp <12mVpp <15mVpp <18mVpp
Output connector SMA SMA SMA SMA
Output impedance 50Ω 50Ω 50Ω SMA
Output coupling mode DC DC DC DC
Maximum output amplitude@HiZ 3V 3V 3V 3V
Operating temperature -20~65℃ -20~65℃ -20~65℃ -20~65℃
Storage temperature -40~85℃ -40~85℃ -40~85℃ -40~85℃
Dimensions 82.5 mm x 64 mm x 25 mm 82.5 mm x 64 mm x 25 mm 82.5 mm x 64 mm x 25 mm 82.5 mm x 64 mm x 25 mm


The typical responsivity of  APD20

Mechanical Drawing

The mechanical Drawing of APD20

Avalanche Photodetector, InGaAs, Fixed Gian, fiber-coupled,800-1700nm