Cu∶KNSBN晶体衍射效率的角度选择性研究  

Investigation into the selectivity of diffraction efficiency of Cu:KNSBN grating on recording angle

作　　者：马宝红[1] 石顺祥[2] 

机构地区：[1]洛阳师范学院物理与电子信息学院,河南洛阳471022 [2]西安电子科技大学,西安710071

出　　处：《光学技术》2009年第5期778-780,共3页Optical Technique

摘　　要：耦合波理论是分析光折变晶体的基本方法,由耦合波理论可以得到光折变晶体的衍射效率具有角度选择性。针对这一结论,利用Cu:KNSBN晶体中的双光束耦合,从理论和实验两个角度做了分析,实验结果和理论分析基本吻合。结果表明,对于一定厚度的Cu∶KNSBN晶体,双光束的写入角存在着一个最佳值,使得Cu:KNSBN晶体的衍射效率最大。The selectivity of diffraction efficiency of Cu：KNSBN grating on recording angle is investigated by using the coupled wave theory.It is found that the diffraction efficiency has a dependency on the recording angle.For a fixed thickness of the Cu：KNSBN crystal,its diffraction efficiency gets its maximum when the grating is recorded at an optimal recording angle.The corresponding experiment is carried out,and the experimental results are consistent with the theoretical calculations.

关 键 词：双光束耦合 衍射效率 写入角 

分 类 号：O734.1[理学—晶体学]