通过数值求解广义非线性薛定谔方程,分析了32路线性啁啾高斯脉冲堆积后的整形脉冲在单模光纤中的传输特性。结果表明经50 m单模光纤传输后脉冲的脉宽和包络形状基本不变; 非线性效应中的自相位调制和脉冲内Raman散射对脉冲频域特性影响较大,使频谱展宽约40 THz,中心角频率下移约10 THz; 而自陡效应,三阶色散对传输特性影响不大。

The characteristics of nonlinear transmission of shaped pulse through the stacking 32 linearly chirped Gaussian pulses in single mode fiber were analyzed by solving the generalized nonlinear Schrdinger equation numerically. The simulating results indicate that after 50 m transmission in a single mode fiber, the duration and the envelope shape of the stacking chirped pulses have almost no change. The nonlinear effects, such as self-phase modulation and intrapulse Raman scattering, impact seriously on the spectral domain characteristics of the pulse, the spectral width is broaden about 40 THz and the center angle-frequency is downshift about 10 THz. The self-steepening effect and the third order dispersion affect the transmission characteristics little.