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Superconducting Qubits Quantum Cryptography Security Photonic Quantum Computing

Free-running InGaAs single photon detector with 1 dark count per second at 10% efficiency

arXiv
Authors: Boris Korzh, Nino Walenta, Tommaso Lunghi, Nicolas Gisin, Hugo Zbinden

Year

2013

Paper ID

31512

Status

Preprint

Abstract Read

~2 min

Abstract Words

99

Citations

N/A

Abstract

We present a free-running single photon detector for telecom wavelengths based on a negative feedback avalanche photodiode (NFAD). A dark count rate as low as 1 cps was obtained at a detection efficiency of 10%, with an afterpulse probability of 2.2% for 20 μs of deadtime. This was achieved by using an active hold-off circuit and cooling the NFAD with a free-piston stirling cooler down to temperatures of -110{o}C. We integrated two detectors into a practical, 625 MHz clocked quantum key distribution system. Stable, real-time key distribution in presence of 30 dB channel loss was possible, yielding a secret key rate of 350 bps.

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  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
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  • We present a free-running single photon detector for telecom wavelengths based on a negative feedback avalanche photodiode (NFAD).

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1312.2636 [2] arXiv https://arxiv.org/abs/1312.2636 [3] Publisher https://arxiv.org/abs/1312.2636

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