Dynamic Characteristics of a Mach Zehnder Wavelength Converter
Zheng Xueyan Guan Kejian Ye Peida (Post Telecommunication University of Beijing, The School of Telecommunication Engineering, Beijing 100088)
By using the high frequency saturation filtering effect and dynamic carrier recovery time, the dependence of the frequency chirping and intersymbol interference (ISI) of a wavelength converter based on cross phase modulation in Mach Zehnder wavelength converter is analyzed. While the extinction ratio is kept the same at different probe power for out phase converting, the poorer performance of the converted signal is due to a longer gain recovery time and the larger intersymbol interference. But for in phase converting, the high probe or fast carrier recovery time is not surely better than that of low probe power.