Abstract We report on a theoretical analysis of the effects of a converging pump field of Gaussian transverse profile on second harmonic generation in a periodic nonlinear material with quasi-phase-matching. The outputs of the centre intensity and the intensity flux for second harmonic generation are derived by simulation, based on the parameters of quasi-phase-mismatch, the waist and focus positions of the input pump beam. The results show that when the transverse profile of the pump field is taken into account, the quasi-phase-match value and focus position of input beam for maximal second harmonic generation follow new criteria.
Received: 09 February 2002
Revised: 14 October 2002
Accepted manuscript online:
PACS:
42.65.Ky
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
Fund: Project supported by the Foundation for Excellent Young Teachers from the Ministry of Education of China, and the Foundation for University Key Teachers from the Ministry of Education of China.
Cite this article:
Zhang Han-Zhuang (张汉壮), Yang Jian-Bing (杨建冰), Gao Jin-Yue (高锦岳) Effects of transverse profile of pump field on second harmonic generation in periodic nonlinear materials 2003 Chinese Physics 12 518
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