【作者】 韩耀锋； 李琨； 张彬； 蔡邦维；

【Author】 Han Yaofeng Li Kun Zhang Bin Cai Bangwei(College of Electronic information, Sichuan University, Chengdu 610064,china)

【机构】 四川大学电子信息学院；

【摘要】 在考虑自相位调制,交叉相位调制和群速度失配的情况下,通过数值模拟对高强度飞秒激光的三倍频过程作了计算;分析了自相位调制,交叉相位调制和群速度失配对三倍频光脉冲形状以及转换效率的影响。在此基础上,对提高三倍频光的转换效率的方法进行讨论。结果表明,自相位调制交叉相位调制使三倍频光脉冲形状畸变、转换效率下降;群速度延迟使转换效率下降、脉冲严重展宽.更多还原

【Abstract】 The group velocity mismatch (GVM) and self- and cross- phase modulation (SPM, XPM) have been considered in the process of third harmonic generation by solving the coupling wave equations. The effects of SPM, XPM and GVM on the pulse shape and conversion efficiency have been analyzed. Furthermore, the methods for improving the conversion efficiency have been discussed. The study results indicate that SPM, XPM and GVM can not-only reduce the third harmonic conversion efficiency, but also broaden and deform the temporal shape of the third harmonic pulse.更多还原