Avalanche photodiodes

Germanium Avalanche Photodiodes

Ge Avalanche Photodiodes


Germanium photodiodes are commonly used to measure optical power in the NIR range, especially in cost-sensitive applications or where a large-area detector is needed. However, germanium detectors have a lower shunt resistance and higher dark current than similarly-sized InGaAs detectors, resulting in higher noise levels overall. Therefore, germanium detectors are well suited for applications where the signal being detected is much higher than the noise floor. GPD Optoelectronics offers an “HS” series of germanium photodiodes which have higher-than-typical shunt resistance for improved performance.


  • Small Diameter (40µm)
  • 800nm to 1800nm Spectral Response
  • Linear and Geiger Mode Operation
  • High Sensitivity
  • Fiber Pigtail (Single or Multi Mode) including Hi-Reliability Pigtail
  • Thermoelectric Cooling Available
  • Packages (TO-46 and sub-mount)


  • Optical Time Domain Reflectometer (OTDR)
  • Optical Communications
  • Photon Counting

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