Room temperature single-photon detectors for high bit rate quantum key distribution

Abstract

We report room temperature operation of telecom wavelength single-photon detectors for high bit rate quantum key distribution (QKD). Room temperature operation is achieved using InGaAs avalanche photodiodes integrated with electronics based on the self-differencing technique that increases avalanche discrimination sensitivity. Despite using room temperature detectors, we demonstrate QKD with record secure bit rates over a range of fiber lengths (e.g. 1.26 Mbit/s over 50 km). Furthermore, our results indicate that operating the detectors at room temperature increases the secure bit rate for short distances.

14 pages, 4 figures

References in corpus (4)

• High speed single photon detection in the near-infrared
• Coexistence of high-bit-rate quantum key distribution and data on optical fiber
• 2-GHz clock quantum key distribution over 260 km of standard telecom fiber
• Continuous operation of high bit rate quantum key distribution

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