Performance comparison between two feedback signals for PMD compensation

In order to study the compensation effect of the polarization mode dispersion(PMD) when the degree of polarization and electrical power are employed as feedback signals in a fibre-optic communication system,the performance between two feedback signals are compared by means of numerical simulation.The simulation results show that when high order PMD is not considered,two signals are linearly changed with differential group delay(DGD).But when the high order PMD is considered,two signals are not linearly correlative with DGD.On the other hand,the performance of degree of polarization is better than that of electrical power.These results will be useful for adaptive PMD compensation.