Perfect quasi-phase matching for the third-harmonic generation using focused Gaussian beams.
Perfect quasi-phase matching for the third-harmonic generation using focused Gaussian beams.
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DOI：
10.1364/ol.33.000720
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发表时间：
2008-04
期刊：
影响因子：
3.6
通讯作者：
Chao Zhang;Yiqiang Qin;Yong‐yuan Zhu
中科院分区：
文献类型：
--
作者：
Chao Zhang;Yiqiang Qin;Yong‐yuan Zhu
提出了一种实现高斯光束非线性光学相互作用的准相位匹配（QPM）方法。该方法可以同时补偿波矢失配和古伊相移。对三次谐波产生的数值模拟表明，即使在基波紧密聚焦的情况下，也可以实现接近100%的转换效率，而这在传统的QPM方法中是很难甚至不可能实现的。
We propose a method to realize perfect quasi-phase matching (QPM) for nonlinear optical interactions involving Gaussian beams. Using this method, both the wave-vector mismatching and the Gouy phase shift can be compensated. Numerical simulations for the third-harmonic generation show that conversion efficiency near to 100% can be realized even if the fundamental wave is tightly focused, which is difficult or even impossible with the conventional QPM method.