Capacity of optical transmission with attenuation and amplification

摘要：

The optical signal transmitted on a fiber with thermal noise, attenuation and amplification is studied. The channel is considered as a quantum channel while the signal to be transmitted is classical. The classical information is encoded in a quantum state then it is transmitted in optical fiber. At the receiving end, measurement is performed on the output quantum state to retrieve the classical information. The optimal distribution of the input quantum state achieving the channel capacity is Gaussian.The capacity is characterized by the attenuation/amplification coefficient and thermal noise in the transmission and at the measurement process together by the power of the input. The loss (or attenuation) of an optical fiber usually should be compensated by the amplification. We will show that when they coexist,additional noise occurs.

作者: Xiao-yu Chen Li-zhen Jiang Liang Han

作者单位: Lab.of quantum information China Institute of Metrology China Hangzhou, 310034, China Dept.of Physics China Institute of Metrology China Hangzhou, 310034, China

会议类型: 国际会议

会议名称: 2006年IEEE信息理论国际会议(Proceedings of 2006 IEEE Information Theory Workshop ITW06)

会议地点: 成都

会议语种:英文

页码: 277-280

在线出版日期: 2006-10-22（万方平台首次上网日期，不代表论文的发表时间）