Philip Geo M, Viswanathan Nirmal K
School of Physics, University of Hyderabad, Gachibowli, Hyderabad-500036, India.
J Opt Soc Am A Opt Image Sci Vis. 2010 Nov 1;27(11):2394-401. doi: 10.1364/JOSAA.27.002394.
We report here the generation of a chain of three-dimensional (3-D) optical bottle beams by focusing a π-phase shifted multi-ring hollow Gaussian beam (HGB) using a lens with spherical aberration. The rings of the HGB of suitable radial (k(r)) and axial (k(z)) wave vectors are generated using a double-negative axicon chemically etched in the optical fiber tips. Moving the lens position with respect to the fiber tip results in variation of the semi-angle of the cones of wave vectors of the HGBs and their diameter, using which we demonstrate tunability in the size and the periodicity of the 3-D optical bottle beams over a wide range, from micrometers to millimeters. The propagation characteristics of the beams resulting from focusing of single- and multi-ring HGBs and resulting in a quasi-non-diffracting beam and a chain of 3-D optical bottle beams, respectively, are simulated using only the input beam parameters and are found to agree well with experimental results.
我们在此报告，通过使用具有球差的透镜聚焦π相移多环空心高斯光束（HGB），产生了一串三维（3-D）光学瓶形光束。合适的径向（k(r)）和轴向（k(z)）波矢的HGB环是使用化学蚀刻在光纤尖端的双负轴棱锥产生的。相对于光纤尖端移动透镜位置会导致HGBs波矢锥的半角及其直径发生变化，利用这一点我们展示了3-D光学瓶形光束的尺寸和周期在从微米到毫米的宽范围内的可调性。仅使用输入光束参数对由单环和多环HGB聚焦分别产生准非衍射光束和一串3-D光学瓶形光束的光束传播特性进行了模拟，发现与实验结果吻合良好。
