Title: Quantum encoder whose polarization state is modulated by phase and decoder and its application
Application Number: 03139636 Application Date: 2003.06.30
Publication Number: 1477413 Publication Date: 2004.02.25
Approval Pub. Date: Granted Pub. Date: 2005.10.19
International Classifi-cation: H04L9/00,H04K1/00,G09C1/00
Applicant(s) Name: Hua'nan Normal Univ. Address: 510630
Inventor(s) Name: Tang Zhilie, Liao Changjun
Attorney & Agent: he yanling luo yong
Abstract:
     The present invention relates to a quantum coder with phase modulated polarization state, decoder and polarization compensating method used in the quantum secret communication, four-state quantum coder and decoder are formed from a phase-polarization controller and a true random generator, and the six-state quantum coder and decoder are formed from two phase-polarization controllers and a synchronous trigger, in the quantum secret communication it utilizes the quantum coder and decoder to effectively compensate the polarization state distortion resulted in the course of signal transmission, so that its error code rate can be greatly reduced to 10 to the minus fifth, and its modulation speed can be up to several GHz from tens Hz.
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