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    • 29. 发明授权
    • Quantum cryptography communication apparatus and communication terminal
    • 量子密码通信装置和通信终端
    • US08165298B2
    • 2012-04-24
    • US12032560
    • 2008-02-15
    • Yohei KawamotoTakuya HiranoKuninori ShinoMasakazu Ukita
    • Yohei KawamotoTakuya HiranoKuninori ShinoMasakazu Ukita
    • H04K1/00
    • H04B10/548G09C1/00H04L9/0858
    • In a quantum cryptography communication apparatus, a light pulse is generated by a light source and split into a signal light pulse and a reference light pulse on a receiving side. The signal light pulse and the reference light pulse are transmitted to a sending side via a communication channel. On the sending side, the received reference light is passed through a first optical path and phase-modulated by a randomly selected amount. Communication information is acquired on the basis of the reference light passed through the first optical path and the signal light passed via a second optical path. Frequencies of the signal light pulse and the reference light pulse are shifted. The intensity of the signal light pulses is attenuated and phase-modulated by an amount corresponding to the communication information. The resultant signal light pulse and the reference light pulse are returned back to the receiving side.
    • 在量子密码通信装置中,由光源产生光脉冲,并在接收侧分割为信号光脉冲和参考光脉冲。 信号光脉冲和参考光脉冲经由通信信道发送到发送侧。 在发送侧,接收到的参考光通过第一光路并被随机选择的量进行相位调制。 基于通过第一光路的参考光和经由第二光路通过的信号光获取通信信息。 信号光脉冲和参考光脉冲的频率偏移。 信号光脉冲的强度被衰减并相位调制与通信信息对应的量。 所得到的信号光脉冲和参考光脉冲被返回到接收侧。