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We present and analyze a gated single photon avalanche detector using a sinegating scheme with a simple but effective low-pass filtering technique for fastlow-noise single photon detection at telecom wavelength. The detector ischaracterized by 130 ps short gates applied with a frequency of 1.25 GHz,yields only 70 ps timing jitter and noise probabilities as low as 7E-7 per gateat 10% detection efficiency. We show that the detector is suitable for highrate quantum key distribution (QKD) and even at room temperature it could allowfor QKD over distances larger than 25 km.

Sine gating detector with simple filtering for low-noise infra-red single photon detection at room temperature