Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 19, Issue 8, Pages 1104-1109Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/50.939789
Keywords
fiber nonlinearity; information theory; optical-fiber communication systems; Volterra series; wavelength division multiplexing (WDM) systems
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We extend the Shannon information theory to a nonlinear system and present a model for calculating the channel capacity of an optical-fiber transmission system using dispersion-free fiber. For this particular fiber, a closed-form solution for the nonlinear Schroedinger equation exists. This allows us to derive an analytical result for the channel capacity that is exact and valid for arbitrary input power. We will study the single-span case and examine the dependence of the capacity on operating input power, the number of channels (N-c), the noise power (P-W), etc. The maximum capacity is shown to follow a simple scaling law with log(2) (1 + CNc-2/3PW-2/3) with dependence.
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