Analysis and Compensation of Nonlinear Impairments in Fiber-Optic Communication Systems

Abstract

Fiber optic communications make the backbone of telecommunications. Optical ber is an excellent transmission medium due to its low loss, high bandwidth and robustness. However, the dispersive and nonlinear e ects of an optical ber lead to signal distortions. Propagation impairments accumulate over ber distance and seriously distort the signal in long-haul communication systems. Transmission performance can be signi cantly improved by compensating for ber dispersion and nonlinear effects. In this thesis, we carry out theoretical analysis of ber nonlinear e ects and develop analytical models to characterize di erent kinds of nonlinearities. Moreover, we investigate various digital and optical methods to compensate for dispersive and nonlinear distortions, which signi cantly enhance transmission performance, spectral e ciency and system capacity.