TY - JOUR
T1 - QAM Quantum Noise Stream Cipher Transmission over 100 km with Continuous Variable Quantum Key Distribution
AU - Nakazawa, Masataka
AU - Yoshida, Masato
AU - Hirooka, Toshihiko
AU - Kasai, Keisuke
AU - Hirano, Takuya
AU - Ichikawa, Tsubasa
AU - Namiki, Ryo
N1 - Funding Information:
Keisuke Kasai (M’07) received the B.S., M.S., and Ph.D. degrees from Tohoku University, Sendai, Japan, in 1999, 2005, and 2008, respectively. From 2009 to 2012, he was a Research Fellow with the Japan Society for the Promotion of Science. He is currently an Assistant Professor with the Research Institute of Electrical Communication, Tohoku University. His research interests include frequency stabilized lasers, coherent optical transmission, and high-speed optical time division multiplexing trans-mission. He is a member of the Institute of Electronics, Information, and Communication Engineers of Japan, the Japan Society of Applied Physics, and the Laser Society of Japan. He received the Asia-Pacific Microwave Photonics Conference Best Student Paper Award, the IEICE Electronics Express Best Paper Award, and the IEICE Best Paper Award.
Funding Information:
Toshihiko Hirooka (M’00) received the Ph.D. degree in electronics and information systems engineering from Osaka University, Osaka, Japan, in 2000. From 2000 to 2002, he was a Research Associate with the Department of Applied Math-ematics, University of Colorado Boulder, Boulder, CO, USA. He is currently an Associate Professor with the Research Institute of Electrical Commu-nication, Tohoku University, Sendai, Japan. He has been involved in research on ultrahigh-speed optical communications and nonlinear fiber optics, including optical time division multiplexing transmission, optical solitons, and optical signal processing. He is a member of the Optical Society of America, the Institute of Electronics, Information, and Communication Engineers of Japan, and the Laser Society of Japan. He received the IEICE Young Researcher’s Award, the Young Researcher Award by the Minister of MEXT in Japan, and the RIEC Award from Tohoku University.
Funding Information:
Dr. Nakazawa is a fellow of the Optical Society of America (OSA), the IEICE, and the Japan Society of Applied Physics. He has received the IEE Electronics Letters Premium Award, the IEEE Daniel E. Noble Award, the OSA R. W. Wood Prize, a Thomson Scientific Laureate, the IEEE Quantum Electronics Award, the OSA Charles Hard Townes Award, a Purple Ribbon Medal, and the Japan Academy Prize. He was the President of the Electronics Society of the Institute of Electronics, Information, and Communication Engineers of Japan in 2006 and a Board Member of OSA from 2008 to 2010. He was also on the Board of Governors of the IEEE Photonics Society from 2013 to 2015.
Publisher Copyright:
© 2017 IEEE.
PY - 2017/8
Y1 - 2017/8
N2 - We report the first on-line high-speed and large-capacity secure optical communication system. This was realized by combining a quadrature amplitude modulation/quantum noise stream cipher technology where a coherent multi-level optical signal is hidden in quantum noise and a quantum key distribution technology where secure key delivery is realized with an extremely weak laser light comparable to a single photon. In our security analysis, we adopt a realistic assumption, namely, that an adversary does not have a lossless fiber. To show the advantage of this scheme, we performed a 128 QAM, 70-Gbit/s single-channel transmission over 100 km with a spectral efficiency of as high as 10.3 bits/s/Hz. This is the fastest data rate and highest spectral efficiency yet achieved in quantum cryptography with a realistic assumption.
AB - We report the first on-line high-speed and large-capacity secure optical communication system. This was realized by combining a quadrature amplitude modulation/quantum noise stream cipher technology where a coherent multi-level optical signal is hidden in quantum noise and a quantum key distribution technology where secure key delivery is realized with an extremely weak laser light comparable to a single photon. In our security analysis, we adopt a realistic assumption, namely, that an adversary does not have a lossless fiber. To show the advantage of this scheme, we performed a 128 QAM, 70-Gbit/s single-channel transmission over 100 km with a spectral efficiency of as high as 10.3 bits/s/Hz. This is the fastest data rate and highest spectral efficiency yet achieved in quantum cryptography with a realistic assumption.
KW - Quantum cryptography
KW - on-line systems
KW - optical fiber communication
KW - quadrature amplitude modulation
UR - http://www.scopus.com/inward/record.url?scp=85028442872&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028442872&partnerID=8YFLogxK
U2 - 10.1109/JQE.2017.2708523
DO - 10.1109/JQE.2017.2708523
M3 - Article
AN - SCOPUS:85028442872
VL - 53
JO - IEEE Journal of Quantum Electronics
JF - IEEE Journal of Quantum Electronics
SN - 0018-9197
IS - 4
M1 - 7933953
ER -