19 November 2012 Single photon detection and quantum cryptography
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We present a general purpose theoretical model of single-photon detectors in quantum key distribution systems and apply it to an autonomous gigahertz clocked phase basis set system operating at a wavelength of 850 nm over a standard telecommunications fiber quantum channel. The system has been demonstrated using a variety of different singlephoton detectors, including thick and thin junction silicon single-photon avalanche photodiodes and the first implementation of a resonant cavity thin junction silicon single-photon avalanche diode. We show, by means of the theoretical model, how improvements to certain detector parameters can optimize key exchange rates.
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Gerald S. Buller, Patrick J. Clarke, Robert J. Collins, "Single photon detection and quantum cryptography", Proc. SPIE 8542, Electro-Optical Remote Sensing, Photonic Technologies, and Applications VI, 85421V (19 November 2012); doi: 10.1117/12.974666; https://doi.org/10.1117/12.974666

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