Free-space quantum key distribution experiment with polarization basis tracking between portable optical terminals

Mono Toyoshima, Hideki Takenaka, Christian Shaefer, Yozo Shoji, Yoshihisa Takayama, Hiroo Kunimori, Masahiro Takeoka, Mikio Fujhvara, Masahide Sasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A free-space quantum key distribution system is being developed by the National Institute of Information and Communications Technology (NICT) in Koganei, Japan. Quantum cryptography is a new technique for transmitting information where the security is guaranteed by the laws of physics. In such systems, a single photon is used for the quantum information; however, since the transmission distance in optical fibers is limited by the absorption of photons by the fiber, the maximum demonstrated range has been about 100 km. Free-space quantum cryptography between an optical ground station and a satellite is a possible solution to extend the distance for a quantum network further beyond the limits of optical fibers. At NICT, a 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, free-space quantum cryptography is considered an important application for the future. A prototype system for free-space quantum cryptography using a free-space polarization tracking scheme has been developed by NICT, and the preliminary test results for the quantum key distribution with the polarization tracking are presented here.

Original languageEnglish
Title of host publicationInternational Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008
Pages3185-3192
Number of pages8
Publication statusPublished - 2008
Externally publishedYes
Event59th International Astronautical Congress 2008, IAC 2008 - Glasgow, United Kingdom
Duration: 2008 Sep 292008 Oct 3

Publication series

NameInternational Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008
Volume5

Other

Other59th International Astronautical Congress 2008, IAC 2008
Country/TerritoryUnited Kingdom
CityGlasgow
Period08/9/2908/10/3

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering
  • Astronomy and Astrophysics

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