Next-to-leading order corrections to capacity for nondispersive nonlinear optical fiber channel in intermediate power region

Abstract

We consider the optical fiber channel modelled by the nonlinear Shrödinger equation with zero dispersion and additive Gaussian noise. Using Feynman path-integral approach for the model we find corrections to conditional probability density function, output signal distribution, conditional and output signal entropies, and the channel capacity at large signal-to-noise ratio. We demonstrate that the correction to the channel capacity is positive for large signal power. Therefore, this correction increases the earlier calculated capacity for a nondispersive nonlinear optical fiber channel in the intermediate power region.

9 pages, 2 figures

References in corpus (3)

• Capacity of a Nonlinear Optical Channel with Finite Memory
• On the Per-Sample Capacity of Nondispersive Optical Fibers
• Calculation of mutual information for nonlinear communication channel at large SNR