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从理论上分析了非线性折射率引起的脉冲自位相调制对超短脉冲的影响。提出用时间域滤波改善飞秒激光脉冲质量。针对这一新的方法进行了数值模拟分析。研究结果表明时间域滤波可使系统输出脉冲变窄 ,并提高了脉冲峰值功率 ,有效地提高了脉冲的质量
The influence of nonlinear phase modulation caused by nonlinear refractive index on ultrashort pulse is theoretically analyzed. The time domain filtering is proposed to improve the quality of femtosecond laser pulse. A numerical simulation of this new method was carried out. The results show that time-domain filtering can narrow the output pulse of the system and improve the pulse peak power, effectively improving the quality of the pulse