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Proceedings Paper

Low-noise PPLN-based single-photon detector
Author(s): Hai Xu; Lijun Ma; Oliver Slattery; Xiao Tang
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Paper Abstract

This paper describes the detection of single photons, which have been transmitted through standard fiber at the telecom wavelength of 1310 nm. Following transmission, the 1310-nm photon is up-converted to 710 nm in a periodical-poled LiNbO3 (PPLN) waveguide and then detected by a silicon-based avalanche photodiode (Si-APD). The overall detection efficiency of the detector is 20%. We have also characterized the sensitivity of the PPLN's efficiency to temperature and wavelength changes. We focused on the noise property of the up-conversion detector. Without classical channel co-propagation, the dark count rate is 2.2 kHz, which is lower than current up-conversion detectors by more than one order of magnitude. The up-conversion detector is then applied to a QKD system, which is characterized and is shown to have a very strong performance.

Paper Details

Date Published: 10 September 2007
PDF: 8 pages
Proc. SPIE 6780, Quantum Communications Realized, 67800U (10 September 2007); doi: 10.1117/12.734345
Show Author Affiliations
Hai Xu, National Institute of Standards and Technology (United States)
Lijun Ma, National Institute of Standards and Technology (United States)
Oliver Slattery, National Institute of Standards and Technology (United States)
Xiao Tang, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 6780:
Quantum Communications Realized
Yasuhiko Arakawa; Masahide Sasaki; Hideyuki Sotobayashi, Editor(s)

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