利用孤子微扰理论分析了克尔透镜锁模激光器中由高阶色散效应引起的色散波,给出了色散波的频率位置、时间宽度和所包含的能量的解析表达式,与实验结果符合得很好。此结果对于设计腔内色散,以改善脉冲光束质量,减少脉冲能量损失,获取最短光脉冲具有重要意义。

The generation of dispersive waves caused by multi higher-order dispersions in Kerr-lens mode-locked solitary lasers is investigated by soliton perturbation theory. Analytical expressions for resonant frequencies, temporal width and energy of dispersive waves are derived, which are in good agreement with experimental measurements. The results are important for intra-cavity dispersion management for improving the pulse quality and minimizing the pulse energy drain.