Theoretical analysis of the second-harmonic light power in a biaxial crystal  

作　　者：李国辉 叶捷 徐信业 

机构地区：[1]State Key Laboratory of Precision Spectroscopy and Department of Physics,East China Normal University

出　　处：《Chinese Optics Letters》2010年第7期693-696,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 10774044);the National Key Basic Research and Development Program of China (No. 2006CB921104);the Science and Technology Commission of Shanghai Municipality of China (No. 07JC14019);the Shanghai Pujiang Talent Program of China (No. 07PJ14038);the PhD Program Schol-arship Fund of East China Normal University (ECNU) 2009 (No. 2009049)

摘　　要：Theoretical analyses are presented on the critically phase-matched second-harmonic generation （SHG） in a biaxial crystal with the focused fundamental Gaussian beams. The dependence of the second-harmonic light power on the phase matching conditions, focused geometries, walk-off effects, and absorptions are discussed in detail. Expressions are presented for calculating the light power of the types I and II SHGs in the biaxial crystal, applied to optimize the blue light generation with the LiB305 crystal. A maximum conversion efficiency of around 37% is obtained with 798-nm laser power of 500 mW.Theoretical analyses are presented on the critically phase-matched second-harmonic generation （SHG） in a biaxial crystal with the focused fundamental Gaussian beams. The dependence of the second-harmonic light power on the phase matching conditions, focused geometries, walk-off effects, and absorptions are discussed in detail. Expressions are presented for calculating the light power of the types I and II SHGs in the biaxial crystal, applied to optimize the blue light generation with the LiB305 crystal. A maximum conversion efficiency of around 37% is obtained with 798-nm laser power of 500 mW.

关 键 词：Conversion efficiency Gaussian beams Optical frequency conversion 

分 类 号：O436[机械工程—光学工程]