中国物理B ›› 2003, Vol. 12 ›› Issue (5): 518-523.doi: 10.1088/1009-1963/12/5/310

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Effects of transverse profile of pump field on second harmonic generation in periodic nonlinear materials

张汉壮, 杨建冰, 高锦岳   

  1. College of Physics, Jilin University, Changchun 130023, China
  • 收稿日期:2002-02-09 修回日期:2002-10-14 出版日期:2005-03-16 发布日期:2005-03-16
  • 基金资助:
    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.

Effects of transverse profile of pump field on second harmonic generation in periodic nonlinear materials

Zhang Han-Zhuang (张汉壮), Yang Jian-Bing (杨建冰), Gao Jin-Yue (高锦岳)   

  1. College of Physics, Jilin University, Changchun 130023, China
  • Received:2002-02-09 Revised:2002-10-14 Online:2005-03-16 Published:2005-03-16
  • Supported by:
    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.

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摘要： 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.

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.

Key words: periodic nonlinear materials, second harmonic generation, quasi-phase-matching

中图分类号:  (Frequency conversion; harmonic generation, including higher-order harmonic generation)

  • 42.65.Ky
42.70.Mp (Nonlinear optical crystals) 02.60.Cb (Numerical simulation; solution of equations)