Avalanche Photodiode Receiver Performance Metrics

TECHNICAL NOTE: V803 Avalanche Photodiode Receiver Performance Metrics Introduction The following note overviews the calculations used to assess the noise equivalent power (NEP), noise equivalent input (NEI), and signal to noise ratio (STN) Performance of Avalanche photodiodes (APDs) and APD photoreceivers. Shown are the effects of the APD s effective ionization constant, keff, which characterizes the noise of the Avalanche process. Background APDs are photodetectors that can be regarded as the semiconductor analog of photomultiplier tubes (PMTs). One important difference is that APDs don t have a photocathode that is physically separate from their current gain medium, and so they typically use primary photocarriers more efficiently than PMTs. For the same reason, the quantum efficiency of an APD does not degrade over the lifetime of the detector. A second difference is that the multiplication process in an APD is normally bi directional, so it has different statistics than a PMT in which the gain process is uni directional.

TECHNICAL NOTE: V803 Avalanche Photodiode Receiver Performance Metrics Introduction The following note overviews the calculations used to assess the noise equivalent power (NEP), noise

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  Performance, Receiver, Metrics, Photodiode, Avalanche photodiode receiver performance metrics, Avalanche

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