量子电子学报, 2011, 28 (5): 522, 网络出版: 2011-09-27
分数阶无衍射光束的实验研究
Experimental study of fractional non-diffracting beams
物理光学 分数阶贝塞尔光束 轴棱锥聚焦 分数阶涡旋光束 physical optics fractional Bessel beam focusing with an axicon fractional vortex beam
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。
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. The fractional Bessel beams have a very good characteristics of 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 axicon is, the smaller the central hollow of the transverse intensity distribution is.
陈光明, 陶华, 蒲继雄. 分数阶无衍射光束的实验研究[J]. 量子电子学报, 2011, 28(5): 522. CHEN Guang-ming, TAO Hua, PU Ji-xiong. Experimental study of fractional non-diffracting beams[J]. Chinese Journal of Quantum Electronics, 2011, 28(5): 522.