Free-Space Quantum Cryptography with Quantum and Telecom Communication Channels
- Paper number
IAC-07-B2.3.07
- Author
Dr. Morio Toyoshima, National Institute of Information and Communications Technology, Japan
- Coauthor
Dr. Yoshihisa Takayama, National Institute of Information and Communications Technology, Japan
- Coauthor
Dr. Werner Klaus, National Institute of Information and Communications Technology, Japan
- Coauthor
Mr. Hiroo Kunimori, National Institute of Information and Communications Technology, Japan
- Coauthor
Dr. Mikio Fujiwara, National Institute of Information and Communications Technology, Japan
- Coauthor
Dr. Masahide Sasaki, National Institute of Information and Communications Technology, Japan
- Year
2007
- Abstract
Quantum cryptography is a new technique for the transmission of information whose security is guaranteed by the laws of physics. In such systems, the vehicle to transfer quantum information is a single photon, however, the transmission distance is limited by the absorption of photons in an optical fiber in which the maximum demonstrated range is about 100 km. Free-space quantum cryptography between a ground station and a satellite will be a possible solution to send the quantum information beyond further distances than that with optical fibers since there is no birefringence effect in the atmosphere. At the National Institute of Information and Communications Technology (NICT), the laser communication demonstration between the NICT optical ground station and a low earth orbit satellite was successfully conducted in 2006. For such space communication links, the free-space quantum cryptography is considered to be an important application in the future. A prototype system for free-space quantum cryptography using a quasi-single photon source and a telecom communication channel is demonstrated. The preliminary results are presented.
- Abstract document
- Manuscript document
IAC-07-B2.3.07.pdf (🔒 authorized access only).
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