Free-space quantum key distribution experiment with polarization basis tracking between portable optical terminals
- Paper number
IAC-08.B2.4.7
- Author
Dr. Morio Toyoshima, National Institute of Information and Communications Technology, Japan
- Coauthor
Dr. Yozo Shoji, National Institute of Information and Communications Technology (NICT), Japan
- Coauthor
Dr. Yoshihisa Takayama, National Institute of Information and Communications Technology (NICT), Japan
- Coauthor
Mr. Hiroo Kunimori, National Institute of Information and Communications Technology, Japan
- Coauthor
Dr. Masahiro Takeoka, National Institute of Information and Communications Technology (NICT), Japan
- Coauthor
Dr. Mikio Fujiwara, National Institute of Information and Communications Technology (NICT), Japan
- Coauthor
Dr. Masahide Sasaki, National Institute of Information and Communications Technology (NICT), Japan
- Coauthor
Mr. Hideki Takenaka, N.E. Zhukovsky National Aerospace University Kharkov Aviation Institute
- Coauthor
Mr. Christian Schaefer, Kobe University, Japan
- Year
2008
- Abstract
A free-space quantum key distribution system is being developed in National Institute of Information and Communications Technology (NICT). Quantum cryptography is a new technique for transmitting the information whose security is guaranteed by the laws of physics. In such systems, a single photon is used for the quantum information, however, the transmission distance in the optical fibers 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 an optical ground station and a satellite will be a possible solution to extend the distance for the quantum network beyond further than that with optical fibers. At 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 with the free-space polarization tracking scheme was developed. The preliminary test results for the quantum key distribution with the polarization tracking are presented.
- Abstract document
- Manuscript document
IAC-08.B2.4.7.pdf (🔒 authorized access only).
To get the manuscript, please contact IAF Secretariat.