We have also discussed the effect of the beam divergence on the second harmonicconversion efficiency.
还讨论了泵浦束的发散角对二次谐波转换效率的影响。
2
For the nonlinear harmonicconversion of real laser beams, we have developed a theory by applying the spatial spectrum analysis to the nonlinear coupling.
以按空间频谱展开方法，处理任意光束的非线性谐波转换过程。
3
Furthermore, the suitable chirp of fundamental field can reduce the distortion of third-harmonic pulse and increase the third-harmonicconversion efficiency.