Far-field distribution of third-harmonic generation by two crossed beams
Far-field distribution of third-harmonic generation by two crossed beams
复制标题
两束交叉光束产生三次谐波的远场分布
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Pierre Agostini
中科院分区：
文献类型：
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作者：
S. Fomichev;P. Breger;Pierre Agostini
摘要：由两束小角度交叉的激光束在薄石英板中产生的三次谐波的远场强度分布包括关于平分线近似对称的四个峰。内峰与外峰的强度比的测量得到从10分散到20的值，令人惊讶地大于组合值9。的相位匹配因子，所确定的轴对称的情况下，所需的全三维计算，占所观察到的比率和它的波动。
Abstract.The far-field intensity distribution of the third harmonic generated in a thin silica plate by two laser beams crossed at a small angle comprises four peaks approximately symmetric with respect to the bisector. The measurement of the intensity ratio of the inner to the outer peaks yielded values scattered from 10 to 20, surprisingly larger than the combinatorial value 9. The phase-matching factor, as determined by the full three-dimensional calculations required by the absence of axial symmetry, accounts for the observed ratio and its fluctuations.