TY - GEN
T1 - Novel photon detection technologies for quantum communications
AU - Sasaki, M.
AU - Tanaka, A.
AU - Fujiwara, M.
AU - Yoshino, K.
AU - Takahashi, S.
AU - Nambu, Y.
AU - Tomita, A.
AU - Tajima, A.
AU - Miki, S.
AU - Yamashita, T.
AU - Terai, H.
AU - Wang, Z.
AU - Tsujino, K.
AU - Fukuda, D.
AU - Takeoka, M.
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
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U2 - 10.1117/12.919917
DO - 10.1117/12.919917
M3 - Conference contribution
AN - SCOPUS:84885202415
SN - 9780819490537
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Advanced Photon Counting Techniques VI
T2 - Advanced Photon Counting Techniques VI
Y2 - 25 April 2012 through 26 April 2012
ER -