Year: 2007
Type: article
Abstract: InGaAs avalanche photodiodes (APDs) are convenient for single photon detection in the near infrared (NIR) including the fiber communication bands (1.31∕1.55μm). 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 1GHz. Using a self-differencing technique to sense much weaker avalanches, the authors reduce drastically afterpulse noise. At 1.25GHz, they obtain a detection efficiency of 10.8% with an afterpulse probability of 6.16%. In addition, the detector features low jitter (55ps) and a count rate of 100MHz.
Source: Applied Physics Letters
DOI: 10.1063/1.2760135
Authors: Z. L. Yuan, B. E. Kardynal, A. W. Sharpe, A. J. Shields
Institution: Toshiba (United Kingdom)
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2074263210