摘要
从耦合模方程出发,推导了切伦科夫倍频转换效率公式,并得出该效率主要是由交叠积分决定的结论;通过对交叠积分的计算找到了进一步提高该效率的有效方法;最后用Nd:YAG激光器进行了切伦科夫倍频实验,得到了接近1%的转换效率,增加包层折射率可以使该效率增加到1.3%,实验结果证实了理论分析.
By using coupled-mode equation, the formula for conversion efficiency of Cerenkov second harmonic generation (CSHG) is deduced in this paper. It can be concluded from the analysis that the conversion efficiency of CSHG is determined mainly by overlap integral and an effective method for the enhancement of conversion efficiency is proposed. The measured conversion efficiency in the CSHG experiment using Nd : YAG laser is approximately 1% and it can be enhanced to 1. 3% by increasing the cover refractive index of the waveguide. The experimental results are in good agreement with the theoretical prediction.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1993年第6期520-526,共7页
Acta Optica Sinica
基金
国家"863"计划基金的资助
关键词
转换效率
波导
倍频器
质子交换
conversion efficiency, second harmonic generation.
