【摘要】 基于耦合非线性薛定谔方程,采用分步傅里叶方法分析了在单波长信道和WDM(波分复用)4波长信道中XPM(交叉相位调制)对高速NOLM(非线性光纤环镜)光开关中脉冲传输的影响·数值计算表明:XPM造成NOLM中信号脉冲串扰与畸变,并造成NOLM开关性能的下降·WDM系统NOLM光纤环中的同向传播的各波长之间的XPM串扰比相向脉冲之间的XPM效应的影响更大,并且波长越短输出功率越低,中间信道受XPM的影响所导致的脉座现象和走离效应比两侧波长信道严重·更多还原

【Abstract】 The impact of XPM effect on the pulse transmission in the NOLM switch with high working speed in the single wavelength channel and WDM 4-wavelength channel is analyzed by the split-step Fourier method based on the coupled nonlinear Schr’dinger equation.The simulation results show that XPM induces the crosstalk and aberration of signals and deteriorates the switching performance of NOLM.Furthermore,the impact of XPM crosstalk of wavelengths of the pulse is far more than that of XPM effect of counterpropagating pulses in the fiber loop in the WDM system.The shorter the wavelength is,the lower the output power of NOLM is. The pulse pedestal and walk-off effect induced by XPM in the middle wavelength channels are more than those in the edge wavelength channels.更多还原