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.
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)
