【摘要】 以M axw ell电磁场理论为基础,在综合考虑了高阶色散、高阶非线性、自相位调制、交叉相位调制、自变陡、脉冲内喇曼散射及偏振模色散等因素的基础上,推导了飞秒孤子脉冲在双折射光纤中传输的耦合非线性薛定谔方程,并利用分步傅里叶方法对该方程进行了数值计算,研究分析了偏振模色散对飞秒孤子传输的影响。结果发现:当Dp≤0.1 ps/km1/2时,偏振模色散对系统的影响很小,随着偏振模色散值的增大,系统的传输性能迅速恶化,当偏振模色散值达到0.3 ps/km1/2时,系统的传输距离已经不到无偏振模色散时的1/3;若同时考虑光纤的高阶效应,以飞秒孤子作为载体的系统已经不能实现高速长距离的传输。更多还原

【Abstract】 The femtosecond soliton pulse transmission system NLSE was derived from the Maxwell electromagnetic theory,with high-step dispersion,high-step nonlinear,self-phase modulation,cross-phase modulation,self-steepening,Raman scattering in pulse and PMD taken into account.Then the equation was calculated with Fourier transform method,the influence of PMD on the transmission of the femtosecond soliton was analyzed.The result indicates that the transmission system can hardly be affected by PMD if D_p≤0.1ps/km^1/2;but the system property is deteriorated quickly with the increase of D_p.If D_p=0.3ps/km^1/2,the transmission distance is decreased by more than 3 times.If the high-order effect of the optical fiber is considered,the system taking femtosecond soliton as its carrier can not realize high-speed and long-distance transmission.更多还原