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

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 °C. We integrated two detectors into a practical, 625 MHz clocked quantum key distribution system. Stable, real-time key distribution in the presence of 30 dB channel loss was possible, yielding a secret key rate of 350 bps.

Authors:
; ; ; ;  [1]
  1. Group of Applied Physics, University of Geneva, Chemin de Pinchat 22, CH-1211 Geneva 4 (Switzerland)
Publication Date:
OSTI Identifier:
22293064
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; COOLING; COUNTING RATES; DETECTION; EFFICIENCY; GALLIUM ARSENIDES; INDIUM ARSENIDES; MHZ RANGE 100-1000; PHOTODETECTORS; PHOTODIODES; PHOTONS; WAVELENGTHS

Citation Formats

Korzh, B., E-mail: Boris.Korzh@unige.ch, Walenta, N., Lunghi, T., Gisin, N., and Zbinden, H. Free-running InGaAs single photon detector with 1 dark count per second at 10% efficiency. United States: N. p., 2014. Web. doi:10.1063/1.4866582.
Korzh, B., E-mail: Boris.Korzh@unige.ch, Walenta, N., Lunghi, T., Gisin, N., & Zbinden, H. Free-running InGaAs single photon detector with 1 dark count per second at 10% efficiency. United States. doi:10.1063/1.4866582.
Korzh, B., E-mail: Boris.Korzh@unige.ch, Walenta, N., Lunghi, T., Gisin, N., and Zbinden, H. Mon . "Free-running InGaAs single photon detector with 1 dark count per second at 10% efficiency". United States. doi:10.1063/1.4866582.
@article{osti_22293064,
title = {Free-running InGaAs single photon detector with 1 dark count per second at 10% efficiency},
author = {Korzh, B., E-mail: Boris.Korzh@unige.ch and Walenta, N. and Lunghi, T. and Gisin, N. and Zbinden, H.},
abstractNote = {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 °C. We integrated two detectors into a practical, 625 MHz clocked quantum key distribution system. Stable, real-time key distribution in the presence of 30 dB channel loss was possible, yielding a secret key rate of 350 bps.},
doi = {10.1063/1.4866582},
journal = {Applied Physics Letters},
number = 8,
volume = 104,
place = {United States},
year = {Mon Feb 24 00:00:00 EST 2014},
month = {Mon Feb 24 00:00:00 EST 2014}
}
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