外加电场调制二维六角位相阵列光分束器的研究  

A study of two-dimensional hexagonal phase array optical beam splitter modulated by external electric field

作　　者：李建光[1] 陈云琳[1] 张进宏[1] 

机构地区：[1]北京交通大学理学院,北京100044

出　　处：《物理学报》2012年第12期290-295,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61178052);北京交通大学校基金(批准号:2011JBM122;2011JBZ013)资助的课题~~

摘　　要：本文建立了外加电场调制二维六角位相阵列光分束器的倒格矢理论模型,利用数值模拟方法开展了阵列光分束器的理论研究,对可调位相差阵列光分束器进行了分析,得到了不同分数泰伯距离以及外加电场条件下的光强分布图.实验设计与制备了铌酸锂二维六角位相阵列光分束器,并对其进行了Talbot衍射光分束实验研究,当外加电压为0.5 kV(电场为1 kV/mm)时,观测到了Talbot衍射光分束现象,随着外加调制电场的增大,其衍射光分束图像越清晰,该实验结果和理论研究结果相符.In this paper, we establish a theoretical model of reciprocal-lattice vector of the two-dimensional hexagonal phase array optical beam splitter modulated by an external electric field, perform the analysis of the tunable phase-difference array optical beam splitter according to the numerical simulation, and then obtain the images of intensity distribution with different values of fractional Talbot distance and external electric field. The two-dimensional hexagonal phase array optical beam splitter is designed and fabricated by lithium niobate. An experimental study of beam splitting is also given. When the applied voltage is 0.5 kV （with electric field of 1 kV/mm）, we observe the phenomenon of the beam splitting in Talbot diffraction. As the external field increases, the images of beam splitting in diffraction become clearer, the experimental results are in agreement with theoretical results.

关 键 词：外加电场调制 二维六角位相阵列 光分束器 

分 类 号：O436[机械工程—光学工程]