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中文摘要：
采用对称分步傅里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，在相同初始峰值功率条件下，泵浦波长为1000nm的脉冲可以获得更大的压缩因子、峰值功率和更短的最佳光纤长度，并且随着初始峰值功率的增大，其压缩因子和峰值功率增大，最佳光纤长度减小。合理选择泵浦波长和初始峰值功率，可以实现飞秒脉冲在光子晶体光纤中的有效压缩。
英文摘要：
A theoretical investigation with the symmetrical split-step Fourier method was 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 was simulated and analyzed. It was concluded that in the case of the same initial peak power, the compression factor and peak power are the best, while the optimum fiber length is the shortest with the pump wavelength of 1000 nm among these pump wavelengths simulated. It was also found that the compression factor and peak power increase with initial peak power, while the optimum fiber length decrease. By using proper pump wavelengths and initial peak power, efficient pulse compression can be attained in photonic crystal fibers.
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