Abstract:

In order to compensate polarization mode dispersion (PMD) in high speed optical communication systems, an analysis of the principle of PMD monitoring with degree of polarization （DOP） as monitoring signal is proposed. Utilizing DOP method, a high precision and high response rate realtime inline PMD monitoring unit is designed and implemented. The range of input optical power is -20~0dBm, the response time reaches 1μs and the detection accuracy is 1%. An experimental system is set up to adaptively compensate the PMD of 43Gbit/s return to zero differential quadrature phase shift keying system with PMD monitoring unit. Experiments show that the adaptive PMD compensation can be completed in 1 ms and the compensation effect is significant well.

Key words: optical communication systems, polarization mode dispersion, polarization mode dispersion monitoring, polarization mode dispersion compensation