摘要
以Kogelnik耦合波理论为基础,从理论上分析了体全息光栅的写入参数折射率调制度、写入角、晶体厚度与体全息光栅角度选择性的关系。以LiNbO3:Fe晶体进行了实验研究。理论分析和实验研究表明,通过选择折射率调制度、写入角、晶体厚度这三个光栅写入参数,可以使体全息光栅衍射曲线的水平选择角和旁瓣峰值较小,具有较好的角度选择性。
Based on the Kogelnik＇s coupled wave theory, the dependence of the angle selectivity of volume grating on the different crystal thicknesses, recording angles and the refractive index modulation is derived. The dependence is experimentally investigated in LiNbO3：Fe. The theoretical and experimental results show that the desired angle selectivity of volume grating, which means smaller selected angle of level and the adjacency peak, can be determined by the choices of the crystal thicknesses, recording angles and the refractive index modulation.
出处
《西安邮电学院学报》
2007年第5期34-37,共4页
Journal of Xi'an Institute of Posts and Telecommunications
关键词
体全息光栅
耦合波理论
角度选择性
volume grating
coupled wave theory
the angle selectivity
