Title:
秘匿性を有する光通信システムおよび光通信方法
Document Type and Number:
Japanese Patent JP3983766
Kind Code:
B2
Abstract:
The present invention has an object to provide an optical communication system which keeps the confidentiality of information at the optical level to ensure the high safety. To this end, the optical communication system according to the present invention comprises: a PMD providing apparatus that gives the polarization-mode dispersion (PMD) which is changed in accordance with a variable pattern previously determined between an optical sender and an optical receiver to an optical signal output from the optical sender; to send the optical signal to an optical line network; and a PMD restoring apparatus that gives the PMD negating the PMD provided by the PMD providing apparatus to the optical signal propagated through the optical line network and restores the optical signal to the state at the transmission time, to send it to the optical receiver.
Inventors:
Nobuhiro Fukushima
Application Number:
JP2004566258A
Publication Date:
September 26, 2007
Filing Date:
January 10, 2003
Export Citation:
Assignee:
富士通株式会社
International Classes:
H04K1/08; H04B10/25; H04B10/516; H04B10/524; H04B10/61; H04B10/85; H04J14/02
Domestic Patent References:
| JP8167873A | ||||
| JP11215103A | ||||
| JP2000183815A | ||||
| JP2001352303A | ||||
| JP200233701A | ||||
| JP2002124968A |
Foreign References:
| US4866699 |
Attorney, Agent or Firm:
Tomijio Sasashima