Title :
Quantum key distribution over a 60-dB channel loss using SSPD with ultralow dark count rate
Author :
Shibata, Hajime ; Honjo, Toshimori ; Shimizu, Kazuo
Author_Institution :
NTT Basic Res. Labs., NTT Corp., Atsugi, Japan
fDate :
June 30 2013-July 4 2013
Abstract :
We present the first quantum key distribution (QKD) experiment over 60 dB channel loss, which is equivalent to 300 km of fiber. We use the differential phase shift QKD protocol and ultra-low dark count SSPDs.
Keywords :
cryptographic protocols; optical communication equipment; quantum cryptography; superconducting photodetectors; channel loss; differential phase shift QKD protocol; distance 300 km; loss 60 dB; quantum key distribution; superconducting nanowire single photon detector; ultralow dark count SSPD; ultralow dark count rate; Attenuators; Cryptography; Detectors; Optical fibers; Phase modulation; Photonics; Power transmission lines;
Conference_Titel :
Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2013 Conference on
Conference_Location :
Kyoto
DOI :
10.1109/CLEOPR.2013.6600637
