Abstract:

To compensate the effect of polarization mode dispersion (PMD) in fiber-optic transmission systems efficiently and automatically, an automatic compensation experimental system is proposed which uses certain electrical frequency component as control signal. On this foundation, the principles and characteristics of the three optimization algorithms, simplex algorithm, genetic algorithm and particle swarm algorithm, were analyzed and compared. Then these control algorithms were separately adopted not only to compensate first-order PMD alone, but also to compensate both first-order PMD and second-order PMD together. Consequently, the distribution of degree of polarization (DOP) and eye graphs were obtained. The experimental results showed that the particle swarm optimization algorithm is preferable in adaptive PMD compensation system.

Key words: dispersion compensation, degree of polarization, eye opening penalty