高强度三次谐波转换中位相扰动的变化
Variation of phase perturbation in high power third harmonics conversion
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摘要: 以I/II类角度失谐三倍频方案为例，详细讨论了在高强度三次谐波转换过程中入射基频光的位相扰动和振幅调制对三倍频光位相扰动的影响，定量分析了基频光和三倍频光的位相扰动之间的变化关系。模拟结果表明，三倍频光的位相扰动幅度近似为基频光的三倍；入射基频光的位相分布对三倍频光的影响比振幅调制的影响更加明显，但是当入射功率密度较大时，基频光的振幅调制对三倍频光位相分布的影响明显增大。Abstract: In this paper, taking type I/II angledetuning scheme as an example, the effect of phase perturbation and amplitude modulation of the high power incident fundamental field on phase perturbation of the tripling field has been discussed in details. The transformation relation between the phase perturbation of fundamental field and tripling field has been analyzed quantitatively. The results of simulation indicate that the amplitude of phase perturbation of the tripling field is about three times as that of the fundamental field. The effect of phase perturbation of the fundamental field on the phase distribution of the tripling field is much more important than that of the amplitude modulation. However, the effect of the amplitude modulation becomes more important as the power density of the
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