Nemoto S, Yip G L
Appl Opt. 1978 Jan 1;17(1):57-62. doi: 10.1364/AO.17.000057.
Using analytical expressions for the impulse response of a self-focusing optical fiber, the pulse responses to rectangular and Gaussian input pulses are calculated in two cases where (1) all the possible propagating modes and (2) only the modes with no azimuthal variations are equally excited. The refractive index distribution of the fiber is described by the second- and the fourth-order terms of the radial distance. The effects of the index profile and of the width of the input pulse on the shape and the rms width of the output pulse are clarified. The pulse response of the fiber with the optimized alpha-type index profile is also examined.
利用自聚焦光纤脉冲响应的解析表达式，在以下两种情况下计算了矩形和高斯输入脉冲的脉冲响应：（1）所有可能的传播模式；（2）仅无方位变化的模式被同等激发。光纤的折射率分布由径向距离的二阶和四阶项描述。阐明了折射率分布和输入脉冲宽度对输出脉冲形状和均方根宽度的影响。还研究了具有优化α型折射率分布的光纤的脉冲响应。
