High speed single photon detection in the near infrared
- 23 July 2007
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 91 (4), 041114
- https://doi.org/10.1063/1.2760135
Abstract
InGaAs avalanche photodiodes (APDs) are convenient for single photon detection in the near infrared (NIR) including the fiber communication bands . However, to suppress afterpulse noise due to trapped avalanche charge, they must be gated with megahertz repetition frequencies, thereby severely limiting the count rate in NIR applications. Here, the authors show gating frequencies for InGaAs APDs well beyond . Using a self-differencing technique to sense much weaker avalanches, the authors reduce drastically afterpulse noise. At , they obtain a detection efficiency of 10.8% with an afterpulse probability of 6.16%. In addition, the detector features low jitter and a count rate of .
Keywords
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