2012/09/15 by Nino Walenta, Tommaso Lunghi, Olivier Guinnard +3 · 2 citations
Computer Science · Physics and Astronomy · Engineering · #Quantum Information and Cryptography #Advanced Optical Sensing Technologies #Advanced Photonic Communication Systems
paper · doi:10.1063/1.4749802
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.