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公开(公告)号：KR100759811B1
公开(公告)日：2007-09-20
申请号：KR1020060030954
申请日：2006-04-05
Applicant: 한국전자통신연구원
CPC classification number: H04L9/0858
Abstract: 본 발명은 고속으로 양자 암호 키를 전송할 수 있는 자동 보상 양자 암호 송수신장치 및 방법에 관한 것으로 양자 암호 송신 장치는 파장 변환부,광 감쇠기, 광 위상 변조기 및 패러데이 미러를 포함하고, 양자 암호 수신 장치는 편광 분할기, 광 커플러, 광필터 및 광자 검출기를 포함하여 단일 광자가 전송되는 양자 경로상의 광섬유의 레일리이 산란에 의한 전송 속도의 한계를 극복하기 위한 시스템 및 방법에 관한 것이다.
양자 암호, 양자 키 분배-
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公开(公告)号：KR1020070061016A
公开(公告)日：2007-06-13
申请号：KR1020060030954
申请日：2006-04-05
Applicant: 한국전자통신연구원
CPC classification number: H04L9/0858
Abstract: An apparatus and a method for automatically transmitting/receiving compensation quantum cryptography at a high speed are provided to solve a problem of an existing system in which a transmission rate is limited due to Rayleigh scattering of an optical fiber by including a wavelength conversion unit in a quantum signal transmitter and an optical filter for removing an optical signal caused by the Rayleigh scattering in a quantum signal receiver. A wavelength conversion unit converts an optical pulse signal having the first wavelength into an optical pulse signal having the second wavelength(S410). An optical attenuator reduces strength of the wavelength-converted optical pulse signal such that the optical pulse signal has strength of a single photon(S420). Reduced phase of the optical pulse signal is shifted in an optical phase modulator(S430). A Faraday mirror rotates polarization of the phase-shifted optical pulse signal by 90 degrees to reflect it(S440). A polarization divider of a quantum cryptography receiver(Bob) receives the reflected optical pulse signal and divides it into vertical polarization components(S450). The optical phase modulator shifts the phase of a signal having the first polarization component among the polarization-divided optical pulse signal(S460). There occurs interference between the optical pulse signal phase-shifted by an optical coupler and a signal having the second polarization component among the polarization-divided optical pulse signal(S470). An optical filter allows the second wavelength optical pulse signal among the interference signals to pass therethrough(S480). A photon detector detects an output signal of the optical filter(S490).
Abstract translation: 提供了一种高速自动发送/接收补偿量子密码术的装置和方法，以解决由于光纤的瑞利散射而使透射率受到限制的现有系统的问题，包括波长转换单元 量子信号发射机和用于去除由量子信号接收机中的瑞利散射引起的光信号的滤光器。 波长转换单元将具有第一波长的光脉冲信号转换为具有第二波长的光脉冲信号（S410）。 光衰减器降低波长转换的光脉冲信号的强度，使得光脉冲信号具有单个光子的强度（S420）。 在光学相位调制器中移动光脉冲信号的相位减小（S430）。 法拉第镜将相移光脉冲信号的极化旋转90度以反映（S440）。 量子加密接收器（Bob）的偏振分束器接收反射的光脉冲信号并将其分成垂直偏振分量（S450）。 光相位调制器在偏振光分割的光脉冲信号中移位具有第一偏振分量的信号的相位（S460）。 通过光耦合器相移的光脉冲信号与偏振光分割光脉冲信号中具有第二偏振分量的信号之间存在干涉（S470）。 滤光器允许干涉信号中的第二波长光脉冲信号通过（S480）。 光子检测器检测滤光器的输出信号（S490）。
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