In recent years the importance of polarization in lightwave systems has grown as a result of two developments. First, the optical amplifier has dramatically increased the optical path lengths with single-mode fiber. Second, polarization effects have become important in that transmitter and receiver technologies have pushed the capacity of optical fiber to its limit, even in relatively short spans. Polarization mode dispersion (PMD) is one of the major limitations for the high capacity of optical fiber systems.
The aim of this thesis is to present an analysis of the impairments due to first-order PMD. Using numerical simulations by correlation, the impulse response of the channel with PMD was computed. The coefficients of equalizers are calculated by the LMS algorithm. The bandwidth of the optical channel is accounted for and fractional-rate tap spacing equalizers are used for compensation. The effect of first-order PMD compensation will be demonstrated using bit error rates and eye diagrams. This method is easy to extend to any order of PMD in optical linear systems.PDF file, 2.472 Mibytes