分数阶无衍射光束的实验研究

J4 ›› 2011, Vol. 28 ›› Issue (5): 522-527.

分数阶无衍射光束的实验研究

陈光明^1,2, 陶华¹,蒲继雄¹

1 华侨大学信息科学与工程学院, 福建泉州 362021;
2 福建教育学院, 福建福州 350025

收稿日期:2010-11-03 修回日期:2010-12-17 出版日期:2011-09-28 发布日期:2011-08-18
作者简介:陈光明（1955-）副教授，主要从事基础光学，非线性光学等研究工作。Email：cccgm@163.com
基金资助:
国家自然科学基金(60977068)、中国科学院瞬态光学与光子技术国家重点实验室基金项目（SKL ST200912）资助

Experimental study of fractional non-diffracting beams

Chen Guangming^1,2, Tao Hua¹, Pu Jixiong¹

1 College of Information Science & Engineering, Huaqiao University, Quanzhou 362021, China;
2 College of Fujian Education, Fuzhou 350025, China

Received:2010-11-03 Revised:2010-12-17 Published:2011-09-28 Online:2011-08-18

摘要/Abstract

摘要：

实验研究了轴棱锥聚焦分数阶涡旋光束获得分数阶贝塞尔光束。研究结果表明：当分数阶涡旋光束通过轴棱锥聚焦后，获得的分数阶贝塞尔光束其横截面上的光强分布具有高阶无衍射贝塞尔光束的特点；在轴棱锥后的最大准直距离内，光斑的形状基本保持不变，即呈现出很好的无衍射传输特性；另外还研究了轴棱锥角度改变对分数阶贝塞尔光束的影响，实验结果表明，轴棱锥的角度越大时，横截面光强图中的中心空心越小。

关键词: 物理光学, 分数阶贝塞尔光束, 轴棱锥聚焦, 分数阶涡旋光束

Abstract:

The experimental investigation on generation of fractional Bessel beams by focusing the fractional vortex beams with an axicon is carried out. It is shown that when the fractional vortex beams are focused by the axicon, the transverse intensity distribution of the fractional Bessel beams possesses characteristics of high order non-diffracting Bessel beams. Within the maximum collimating distance behind the axicon, the focused light spots seem unchanged during propagation. That is, the fractional Bessel beams have a very good characteristics of the non-diffraction. Moreover, the influence of cone angle of the axicon on the fractional Bessel beams is investigated. The experimental results show that the bigger the cone angle of the axicon is, the smaller the central hollow of the transverse intensity distribution is.

Key words: physical optics, fractional Bessel beam, focusing with an axicon, fractional vortex beam

中图分类号:

O436

陈光明陶华蒲继雄. 分数阶无衍射光束的实验研究[J]. J4, 2011, 28(5): 522-527.

Chen Guangming, Tao Hua, Pu Jixiong. Experimental study of fractional non-diffracting beams[J]. J4, 2011, 28(5): 522-527.

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