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Proceedings Article

Low-noise PPLN-based single-photon detector

[+] Author Affiliations
Hai Xu, Lijun Ma, Oliver Slattery, Xiao Tang

National Institute of Standards and Technology

Proc. SPIE 6780, Quantum Communications Realized, 67800U (September 10, 2007); doi:10.1117/12.734345
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From Conference Volume 6780

  • Quantum Communications Realized
  • Yasuhiko Arakawa; Masahide Sasaki; Hideyuki Sotobayashi
  • Boston, MA | September 09, 2007


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.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Hai Xu ; Lijun Ma ; Oliver Slattery and Xiao Tang
"Low-noise PPLN-based single-photon detector", Proc. SPIE 6780, Quantum Communications Realized, 67800U (September 10, 2007); doi:10.1117/12.734345; http://dx.doi.org/10.1117/12.734345

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