【摘要】 利用描写飞秒强激光在充气毛细管中产生三次谐波的一个理论模型讨论了三次谐波产生的信号_压强曲线 .结果发现 :在毛细管参量和激光参量确定的条件下 ,三次谐波效率受管内气压 ,三次谐波模式 ,走离效应 (walk_off)和相调制效应的影响 .同时 ,发现 ,得到的三次谐波效率接近实验值更多还原

【Abstract】 Using a theoretical model for generation of the third-order harmonic in a gas-filled capillary driven by fs laser pulses,the signal-pressure curves of the third-order harmonic generation in a gas-filled capillary driven by fs laser pulses are discussed. It is found that when the parameters of the capillary and laser pulse are given,the generation efficiency of the third harmonic is influenced by the waveguide modes of the third harmonic,the pressure,the walk-off and the phase modulation,and that the theoretical value of the generation efficiency of the third harmonic,which is given in this paper,approaches the experimental one.更多还原