基于分数Talbot效应的棋盘格状阵列照明器  

A chessboard-like array illuminator based on fractional Talbot effect

作　　者：王伟[1] 王吉明[2] 高尚 陈建中[1] 刘栋 WANG Wei;WANG Jiming;GAO Shang;CHEN Jianzhong;LIU Dong(School of Science,Shandong Jiaotong University,Jinan 250357,China;College of Physics,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]山东交通学院理学院,山东济南250357 [2]南京航空航天大学物理学院,江苏南京211106

出　　处：《光学技术》2023年第2期138-142,共5页Optical Technique

基　　金：国家自然科学基金(11904394);山东省自然科学基金(ZR2017MA040,ZR2020MF102)。

摘　　要：基于分数Talbot效应,利用纯位相光栅设计了一种二维棋盘格状阵列照明器。利用菲涅尔衍射理论分析了平面光波照射下纯位相光栅衍射光场,得到位相调制为(0,π/2)的二阶纯位相光栅可以实现压缩比为2的棋盘格状阵列照明。利用二元光学器件制作技术,在光学玻璃基底上制作了位相光栅。在扩束激光光束照射下,在分数Talbot距离处获得了效率为83.2%的棋盘格状明暗相间光斑阵列。实验结果很好地验证了理论分析结论。研究结果对于光互连、光通信、光电混合处理领域中阵列微光束生成和应用都具有较高的理论和实用价值。Based on fractional Talbot effect,a kind of two-dimensional chessboard-like Talbot array illuminator was designed by using apure phase grating.With Fresnel diffraction theory,the distribution of light field of a pure phase grating illuminated by aplane light wave was analyzed.The results of the analysis shows that two-dimensional chessboard-like Talbot array illuminator with a compression ratio of 2can be obtained by using two step phase grating with phase modulation of(0,π/2).By binary optics technology,the phase grating was fabricated on an optical glass substrate.Under illumination of an expanded He–Ne laser,the chessboard-like high contrast bright and dark spots was obtained at the fractional Talbot distance and had efficiency of 83.2%.The experiment results agree well with the theoretical analysis.The results reported have high theoretical and practical value for the generation and application of array microbeam in the field of optical interconnection,optical communication and photoelectric hybrid processing.

关 键 词：衍射 光栅 TALBOT效应 Talbot阵列照明器 

分 类 号：O438.2[机械工程—光学工程]