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Proceedings Paper

Novel photon detection technologies for quantum communications
Author(s): M. Sasaki; A. Tanaka; M. Fujiwara; K. Yoshino; S. Takahashi; Y. Nambu; A. Tomita; A. Tajima; S. Miki; T. Yamashita; H. Terai; Z. Wang; K. Tsujino; D. Fukuda; M. Takeoka
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Paper Abstract

We present the latest results on two kinds of photon detectors: single photon detectors (SPDs) and photon number resolving detector (PNRD). We developed high speed and low noise SPDs using superconducting nano-wire (abbreviated by SNSPD) and semiconductor (InGaAs) avalanche photodiode (APD). The SNSPD system has totally four channels all of which have the detection eciency higher than 16% at 100Hz dark count rate. The InGaAs APD system also has four channels and the best performance is represented by the after-pulse probability of 0.61%, the dark count probability of 0.71×10-6 (~1kHz), and the detection eciency of 10.9%. Both systems were applied to wavelength division multiplexing quantum key distribution (WDM-QKD) operated at 1.2GHz repetition rate in a eld environment. The PNRD is made of superconducting transition edge sensor. It was applied to the implementation of quantum receiver which could beat the homodyne limit of the bit error rate of binary coherent states. We discuss future perspective of quantum communications with those photon detection technologies, including multi-user QKD networks and low-power high capacity communications.

Paper Details

Date Published: 19 May 2012
PDF: 11 pages
Proc. SPIE 8375, Advanced Photon Counting Techniques VI, 837503 (19 May 2012); doi: 10.1117/12.919917
Show Author Affiliations
M. Sasaki, National Institute of Information and Communications Technology (Japan)
A. Tanaka, NEC Labs. America, Inc. (United States)
M. Fujiwara, National Institute of Information and Communications Technology (Japan)
K. Yoshino, NEC Corp. (Japan)
S. Takahashi, NEC Corp. (Japan)
Y. Nambu, NEC Corp. (Japan)
A. Tomita, Hokkaido Univ. (Japan)
A. Tajima, NEC Corp. (Japan)
S. Miki, National Institute of Information and Communications Technology (Japan)
T. Yamashita, National Institute of Information and Communications Technology (Japan)
H. Terai, National Institute of Information and Communications Technology (Japan)
Z. Wang, National Institute of Information and Communications Technology (Japan)
K. Tsujino, Japan Science and Technology Agency (Japan)
D. Fukuda, National Institute of Advanced Industrial Science and Technology (Japan)
M. Takeoka, National Institute of Information and Communications Technology (Japan)


Published in SPIE Proceedings Vol. 8375:
Advanced Photon Counting Techniques VI
Mark A. Itzler, Editor(s)

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