Single-Photon Detector at Telecommunication Wavelengths Using an Analog Integrator for Ultra Small Avalanche Discrimination
- Single-Photon Detector at Telecommunication Wavelengths Using an Analog Integrator for Ultra Small Avalanche Discrimination
- 보우지드; 한상욱; 이민수; 문성욱
- Single Photon; Integrator; Quantum efficiency; After pulse
- Issue Date
- Applied Physics Express
- VOL 6, NO 5, 052201-1-052201-4
- The afterpulse effect is one of the major bottlenecks limiting the performances of InGaAs/InP single-photon avalanche photodiodes (SPADs) for
high-speed operation. In this paper, we present a practical and easy way to implement an afterpulse suppression scheme. Using an analog
integrator circuit to discriminate small avalanche signals, we reduced drastically the afterpulse noise of the detector. At a repetition frequency of
25 MHz, the overall afterpulse probability is 1.48% with a detection efficiency of 15.6% and a dark count probability of 1:3 x 10-5. In addition, the
detector features a maximum count rate of 25 MHz.
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