泵浦波长对光子晶体光纤中飞秒脉冲压缩的影响

采用分布傅立叶方法数值模拟了飞秒光脉冲在光子晶体光纤反常色散区的非线性传输和压缩过程。计算和分析了不同泵浦波长对光子晶体光纤中超短脉冲传输和压缩的影响，结果表明，在相同初始脉冲峰值功率条件下，泵浦波长为1000nm的脉冲压缩因子和峰值功率最大，最佳光纤长度最短，但品质因子适中，并且随着初始峰值的增大，其压缩因子增长幅度最大。合理选择泵浦波长，有利于增强压缩效果，提高脉冲压缩质量和峰值功率，使得最佳光纤长度减小。

Effect of pump wavelengths on femtosecond pulse compression in photonic crystal fibers

A theoretical investigation with the method of split-step Fourier is presented on the nonlinear propagation and pulse compression of a femtosecond laser pulse at the anomalous region in a photonic crystal fiber. The effect of different pump wavelengths on nonlinear propagation and compression of ultra-short pulse is simulated and analyzed. It was concluded that the compression factor and peak power are the best, and the optimum fiber length is the shortest, while the quality factor is proper with the pump wavelength of 1000nm. And the growth ratio of the compression factor is maximal. By using proper pump wavelengths, compression factor, quality factor, peak power can be increased, while the optimum fiber length is decreased.