Gigacount/second photon detection with InGaAs avalanche photodiodes

Details Gigacount/second photon detection with InGaAs avalanche photodiodes Gigacount/second photon detection with InGaAs avalanche photodiodes

2012-01-16

arxiv.org/abs/1201.3246v1

Electronics Letters 48, 111-113 (2012)

Physics

Instrumentation and Detectors

Electronics Letters (2012)

Scientific paper

10.1049/el.2011.3265

We demonstrate high count rate single photon detection at telecom wavelengths using a thermoelectrically-cooled semiconductor diode. Our device consists of a single InGaAs avalanche photodiode driven by a 2 GHz gating frequency signal and coupled to a tuneable self-differencing circuit for enhanced detection sensitivity. We find the count rate is linear with the photon flux in the single photon detection regime over approximately four orders of magnitude, and saturates at 1 gigacount/s at high photon fluxes. This result highlights promising potential for APDs in high bit rate quantum information applications.

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