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二元计算全息法产生复杂无衍射光束

杨婧羽 任志君 黄文俊 许富洋

杨婧羽, 任志君, 黄文俊, 许富洋. 二元计算全息法产生复杂无衍射光束[J]. 中国光学. doi: 10.37188/CO.2021-0061
引用本文: 杨婧羽, 任志君, 黄文俊, 许富洋. 二元计算全息法产生复杂无衍射光束[J]. 中国光学. doi: 10.37188/CO.2021-0061
YANG Jing-yu, REN Zhi-jun, HUANG Wen-jun, XU Fu-yang. Complex non-diffraction beams generated using binary computational holography[J]. Chinese Optics. doi: 10.37188/CO.2021-0061
Citation: YANG Jing-yu, REN Zhi-jun, HUANG Wen-jun, XU Fu-yang. Complex non-diffraction beams generated using binary computational holography[J]. Chinese Optics. doi: 10.37188/CO.2021-0061

二元计算全息法产生复杂无衍射光束

doi: 10.37188/CO.2021-0061
基金项目: 国家自然科学基金资助项目(No. 11674288)
详细信息
    作者简介:

    杨婧羽(1998—),女,山西忻州人,硕士研究生,2019年于玉林师范学院获得学士学位,现就读于浙江师范大学光学工程专业。主要研究方向为激光束传输与变换。E-mail:1147963526@qq.com

    任志君(1974—),男,内蒙古呼和浩特人,中科院上海光机光学工程专业获博士学位。现为浙江师范大学物理与电子信息工程学院教授,博士生导师。主要从事信息光学、激光技术、光谱技术等方面的研究。E-mail:renzhijun@zjnu.cn

  • 中图分类号: O436

Complex non-diffraction beams generated using binary computational holography

Funds: Supported by National Natural Science Foundation of China (No. 11674288)
More Information
  • 摘要: 无衍射光束是一种能在自由空间稳定传输的光束。近来,一类具有复杂光学形态的无衍射光束被引入,比如马蒂厄光束、抛物光束、非对称贝塞尔光束等。为了产生具有复杂结构的无衍射光束,需要对光波进行复振幅调制,即同时调制光波的振幅和相位。但目前的商用光学调制元件只能调制光波的振幅或相位。本文基于二元计算全息法,编码二维复透过率函数分布,构建了具有复振幅调制功能的二元实振幅非负计算全息图。利用实验室自主研发的投影成像光刻系统,对银盐干板进行曝光处理,经显影、定影处理,将其加工为相应的振幅掩膜板,用来精确产生了具有复杂结构的无衍射光束。以无衍射马蒂厄光束为例,采用罗曼型迂回相位编码方法,在全息图每个抽样单元内开一个矩形通光孔径,通过改变通光孔径的面积来对复值光波的振幅进行编码,通过改变通光孔径中心偏离抽样单元中心的距离,来对复值光波的相位进行编码。最终典型构建了两种产生马蒂厄光束的二元实振幅计算全息图,其像素数高达28000×28000。之后利用加工好的振幅掩膜板,准确、方便、高效地产生了的椭圆系数q=10,拓扑荷数m=0与m=1的第一种偶型马蒂厄光束,其它类型的马蒂厄光束可相应产生,这是一种光束形态多样、光束结构复杂的无衍射光束。实验结果证实了,采用罗曼型迂回相位编码方法产生具有复杂结构的无衍射光束,有效避免了实验过程中分离的相位调制元件和振幅调制元件之间的对准误差,二元计算全息编码法是一种能用来调控产生复杂结构无衍射光束的新途径。
  • 图  1  不规则光栅的衍射效应

    Figure  1.  Diffraction effect of irregular grating

    图  2  抽样单元

    Figure  2.  Sampling cell

    图  3  构建马蒂厄光束二元全息图过程

    Figure  3.  The process of constructing a Mathieu beam binary hologram

    图  4  产生马蒂厄光束的二元计算全息图 (a)m=0, q=10; (b) m=1, q=10

    Figure  4.  Binary computer-generated hologram of a Mathieu beam (a) m=0, q=10; (b) m=1, q=10

    图  5  放大后的计算机全息图部分结构

    Figure  5.  Computer-generated hologram

    图  6  掩膜板实物图

    Figure  6.  Physical picture of the mask plate

    图  7  实验光路图

    Figure  7.  Experimental system

    图  8  采用掩膜板产生的马蒂厄光束(a) m=0, q=10; (b) m=1, q=10

    Figure  8.  Mathieu beam produced by the mask (a) m=0, q=10; (b) m=1, q=10

    图  9  理论模拟产生的马蒂厄光束 (a) m=0, q=10; (b) m=1, q=10

    Figure  9.  The Mathieu beam generated through theoretical simulation (a) m=0, q=10; (b) m=1, q=10

    图  10  采用振幅与相位分开调制产生的马蒂厄光束 (a) m=0, q=10; (b) m=1, q=10

    Figure  10.  Mathieu beam produced by modulating amplitude and phase separately (a) m=0, q=10; (b) m=1, q=10

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  • 网络出版日期:  2021-06-21

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