光纤作为量子信道的性能  

Performance of optical fiber as a quantum channel

作　　者：陈小余[1] 葛洪良[1] 蒋丽珍[1] 裘忠平[1] 

机构地区：[1]中国计量学院物理室,浙江杭州310034

出　　处：《中国计量学院学报》2001年第3期31-34,共4页Journal of China Jiliang University

摘　　要：本文研究光纤作为量子信道在密波分复用时模式间非线性干扰造成的信道噪声的性质 ,和光纤量子信道在该噪声下的经典容量 .用位移算符方法计算量子噪声的累加 ,同时建立了有衰减和噪声时的信道的量子模型 .本文论证如果干扰是各其他模式独立而均等的贡献的叠加 ,信道噪声是热辐射噪声类型的 。In this paper we investigate the noise properties and classical capacity of an optical fiber which is considered as a quantum channel. The noise is due to nonlinear crosstalk between the modes of dense wavelength division multiplexing system. With displacement operator method the total quantum noise is obtained, and a quantum channel model with attenuation and noise is proposed. We conclude that the noise of the mode is of thermal radiation type if all other modes contribute an equally crosstalk to the one considered. Classical capacity is obtained for given parameters of channel.

关 键 词：密波分复用 热辐射噪声 衰减 经典容量 

分 类 号：TN929[电子电信—通信与信息系统]