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

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6 Author(s)
Walenta, Nino ; Group of Applied Physics-Optique, University of Geneva, Chemin de Pinchat 22, 1211 Geneva, Switzerland ; Lunghi, Tommaso ; Guinnard, Olivier ; Houlmann, Raphael
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We present and analyze a gated single photon avalanche detector using a sine gating scheme with a simple but effective low-pass filtering technique for fast low-noise single photon detection at telecom wavelength. The detector is characterized 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 7·10-7 per gate at 10% detection efficiency. We show that the detector is suitable for high rate quantum key distribution (QKD) and even at room temperature it could allow for QKD over distances larger than 25 km.

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Journal of Applied Physics  (Volume:112 ,  Issue: 6 )