通过求解非线性薛定谔方程,分别研究了参量N和入射脉冲的初始啁啾两个重要因素对单模光纤中光孤子形成与传输的影响;应用分布傅立叶法数值模拟了单模光纤中光孤子的形成和传输.结果表明基态孤子长距离传输不变形,高阶孤子具有周期性,若孤子阶数N不为整数但N＞1/2,传输距离ε＞＞1时可以演变为孤子;入射脉冲初始啁啾对孤子的形成是不利的,在满足|C|＜C_max条件下,可以形成稳定的孤子,并数值模拟光孤子传输估算出形成孤子的C_max值.

In this paper,the influence of parameter N and initial chirp on optical soliton formation and transmission is studied by solving the Nonlinear Schrodinger equation in the single mode fiber.The soliton formation and transmission have been simulated numerically by using split step Fourier method in the single mode fiber.The results show that the groud state soliton does not transform in a long distance,high order soliton has periodicity,and if the parameter N is not an integer bet N >1/2,the soliton could be formed when ξ 1; the initial chirp of the entered pulse is disadvantageous for soliton formation,but the stable soliton could be formed when | C|＜C_max,the C_max to from soliton is calculated from the optical soliton transmission through numerical simulation.