鲁棒的光纤量子密码系统的电子学设计  

Electronics design for the robust quantum cryptography system based on optical fibers

作　　者：陈腾云[1] 张军[1] 杨涛[1] 

机构地区：[1]中国科学技术大学近代物理系,安徽合肥230026

出　　处：《中国科学技术大学学报》2006年第6期611-616,共6页JUSTC

基　　金：国家自然科学基金(10304016)资助

摘　　要：单模光纤本身存在着极化模式色散效应,使得极化编码方式很难用于光纤量子密码,对此,我们利用极化纠缠光子对实现了一种时间标记的量子密码方案.该方案克服了单模光纤对极化模式集体旋转影响,且不需要校正参考系.简要介绍了这个方案的原理及其实验过程,并着重介绍整个量子密码系统的电子学设计,最后给出了一些主要的实验结果并同理论预言相比较.To deal with the effect of polarization mode dispersion in single mode fiber, which makes the polarization encoding unsuitable for the fiber-based quantum cryptography, we implemented the experimental demonstration of a quantum cryptography scheme with timing tags using polarization-entangled photon pairs. This scheme can overcome the influence of collective rotation noise of polarization mode in single mode fiber and can work without shared reference frames. A brief introduction is given to the principles and experimental course of this proposal, followed by a discussion on the electronics design for the whole quantum cryptography system. Finally, some results are given and compared them to the theoretical predicts.

关 键 词：极化模式色散 量子密码 量子密钥分发 编码 数据采集 

分 类 号：O431.2[机械工程—光学工程]