光通信中信息量的研究

Research on Capacity of Information in Optical Communications

当采用光纤作为通信信道时 ,传统的信息论及仙农定理已经不再适用。文中分析和推导了含有噪声的光纤信道中的信息量表达式 ,得出每光子的信息量以及它的极限 ,并举例加以具体计算。通过分析可得 ,光纤信道中的信息量远远超过了仙农定理的极限。

It is shown that the theory of information and Shannon Theorem isn’t fit for the fiber channel.In this article,the authors analyse and deduce the equation of capacity in fiber channel with noise,and get the information caoacity of each photon and its limit,and give example and relative calculation.Through analysing,the result capacity in fiber channel far more exceeds by far the limit of Shannon Theorem.