Discriminating photo counts and dark counts in an avalanche photodiode output
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United States of America Patent
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Sep 1, 2015
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app pub date -
May 10, 2013
filing date -
May 10, 2012
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Abstract
The output of an avalanche photodiode (APD) comprises a “photocurrent” component comprising photon initiated events resulting from the interaction of photons with the APD and a “dark current” component comprising dark carrier events arising in the APD even when the APD is not exposed to light. Differences in the pulse height distributions of photon initiated events and dark carrier initiated events are used to statistically discriminate between photocurrent and dark current components of APD output.
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