Channel Model and Upper Bound on the Information Capacity of the Fiber Optical Communication Channel Based on the Effects of XPM Induced Nonlinearity

摘要

An upper bound to the information capacity of a wavelength-division multi-plexed optical fiber communication system is derived in a model incorporatingthe nonlinear propagation effects of cross-phase modulation (XPM). This work isbased on the paper by Mitra et al., finding lower bounds to the channelcapacity, in which physical models for propagation are used to calculatestatistical properties of the conditional probability distribution relatinginput and output in a single WDM channel. In this paper we present a tractablechannel model incorporating the effects of cross phase modulation. Using thismodel we find an upper bound to the information capacity of the fiber opticalcommunication channel at high SNR. The results provide physical insight intothe manner in which nonlinearities degrade the information capacity.