发明名称 |
QUANTUM CRYPTOGRAPHY COMMUNICATION APPARATUS |
摘要 |
<p>Provided is a quantum cryptography communication apparatus capable of preventing a go photon pulse from being phase modulated and also capable of freely selecting any repetitive frequency of a light source. In the quantum cryptography communication apparatus, a quantum receiver apparatus includes: a light source; an optical path loop having a multiplexing/interfering means for generating time difference twin photon pulses from the photon pulses of the light source and for multiplexing and causing interference between a signal optical pulse corresponding to a retrograde quantum and a reference optical pulse; a bypass optical path having a phase modulator for phase modulating only the received reference optical pulse; and a photon detector for observing the interfered light passed through the optical path loop, and a quantum transmitter apparatus includes: a polarized wave rotating means for rotating polarization planes of the twin photon pulses at a right angle in a non-reciprocal manner; a phase modulator for phase modulating and returning the signal optical pulse passed through the polarized wave rotating means, to the quantum receiver apparatus; and a beam attenuating means.</p> |
申请公布号 |
EP1748595(A1) |
申请公布日期 |
2007.01.31 |
申请号 |
EP20040733476 |
申请日期 |
2004.05.17 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
NISHIOKA, TSUYOSHI,;HASEGAWA, TOSHIO,;ISHIZUKA, HIROKAZU, |
分类号 |
H04L9/08;G02F1/01;H04B10/00;H04B10/2507;H04B10/532;H04B10/548;H04B10/70;H04L9/12 |
主分类号 |
H04L9/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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