J4 ›› 2011, Vol. 28 ›› Issue (2): 157-162.

• 第二届全国光学青年学术论坛论文选登 • 上一篇    下一篇

相全息图产生任意阶无衍射光束阵列的理论和实验

胡名西1, 田劲东1,2, 王瑞松1, 李东1,2   

  1. 1深圳大学光电子学研究所, 教育部光电子器件与系统重点实验室, 广东 深圳 518060; 
    2 清华大学精密测试技术仪器国家重点实验室, 北京 100084
  • 出版日期:2011-03-28 发布日期:2011-03-03
  • 通讯作者: 田劲东(1973~),博士,教授,主要从事光学信息获取与处理、机器视觉与图像理解、嵌入式系统技术及应用的研究。 E-mail:jindt@szu.edu.cn
  • 作者简介:胡名西(1986~),男,硕士,主要从事现代光学测试方面的研究。Email:mixihoo@gmail.com。
  • 基金资助:

    国家自然科学基金(608050017)资助项目,国家重点实验室开放基金项目

Experiments and theory of generation of nondiffracting beams array with arbitrary order by phase holograms

HU Mingxi1,TIAN Jindong1,2, WANG Ruisong1, LI Dong1,2   

  1. 1 Key Laboratory of Optoelectronic Devices and Systems of Education Ministry , Institute of Optoelectronics ,Shenzhen University , Shenzhen 518060, China;
    2 State Key Laboratory of Precision Measurement Technology and Instruments,Tsinghua University, Beijing 100084, China
  • Published:2011-03-28 Online:2011-03-03

摘要:

无衍射光束由于其中心光斑尺寸小、传播中无衍射等特性被广泛关注。提出了一种相位全息图产生任意阶次和位置的无衍射光束阵列的方法。设计具有相同特征值的相全息图阵列,即阵列中每幅相全息图在频谱面上产生相同半径的亮环,并把相全息图阵列写入空间光调制器,由于傅里叶变换平移不变性,相全息图阵列在频谱面上仍产生唯一能量集中的亮环,通过环形滤波器将其滤出,再次进行傅里叶变换,便得到无衍射光束阵列,并且每个无衍射光束的位置和阶次都可以任意设置。理论分析和实验均证明了该方法的可行性。

关键词: 相位全息图, 阵列无衍射光束, 空间光调制器

Abstract:

Nondiffracting beams are of interest for optical potential applications owing to their properties of smaller central spot, longer propagation distance and so on. A phase-holograms-based method of generation of nondiffracting beams array with arbitrary order is proposed. If a phase-hologram-array that possesses the same eigenvalue is utilized, a unique bright annulus will be generated in the Fourier plane because of the shift-invariance of Fourier transform and the consistency of phase hologram design. Then through the Fourier transform again, a nondiffracting beams array will be generated. Furthermore, the location and the order of each individual nondiffracting beam can be customized according requirement. Experimental results are in good agreement with the numerical simulation and the theoretical analysis.

Key words: phase hologram, nondiffracting beams array, spatial light modulator

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