大气与环境光学学报 ›› 2019, Vol. 14 ›› Issue (6): 401-410.

所属专题: 大气光学

• 大气光学 •    下一篇

离轴高阶贝塞尔-高斯涡旋光束的传输分析

刘慎哲1,  宋镇江2,  黄秀军2,  石德乐2,  姜明顺3,  隋青美3, 冯德军1,4   

  1. 1 山东大学信息科学与工程学院, 山东济南 250100;
    2 山东航天电子技术研究所, 山东烟台 264670;
    3 山东大学控制科学与工程学院, 山东济南 250061
    4 山东大学苏州研究院, 江苏苏州 215123
  • 出版日期:2019-11-28 发布日期:2019-11-21

Transmission Analysis of Off-Axis High Order Bessel-Gaussian Vortex Beam

LIU Shenzhe1, SONG Zhenjiang2, HUANG Xiujun2, SHI Dele2,  #br# JIANG Mingshun3,SUI Qingmei3, FENG Dejun1,4#br#   

  • Published:2019-11-28 Online:2019-11-21

摘要: 研究高斯光束经螺旋相位板和轴棱锥产生高阶贝塞尔-高斯涡旋光束的离轴传输情况,对于离轴高阶贝塞尔-高斯光束的成因、
光强分布操控、光斑定位等实际应用具有一定的理论指导意义。利用菲涅尔衍射积分的卷积算法(Triple fast Fourier 
transform, T-FFT)对离轴高阶贝塞尔-高斯涡旋光束进行仿真分析,着重研究了螺旋相位板和轴棱锥的错位参数、拓扑荷数
以及传输距离等参数对光束带来的影响。分析表明:离轴高阶贝塞尔-高斯光束具有不均匀的光强分布,由于轴棱锥的偏移,
光束会整体发生偏移,传输不同距离光强不均匀分布情况不同,不同的拓扑荷数只影响光斑的扩展,螺旋相位板和轴棱锥离
轴参量值的多种组合会导致多种不同的光强分布情况,甚至出现暗核偏移。

关键词: 涡旋光束, 光强分布, 螺旋相位板, 拓扑荷数

Abstract: The off-axis transmission of high order Bessel-Gaussian vortex beam produced by spiral phase 
plate (SPP) and axicon is studied, which can provide reference for the off-axis high order 
Bessel-Gaussian beams’ formation, intensity distribution control, spot location and other 
practical applications. On the basis of the theory of diffraction, the transmission of the 
higher order off-axis Bessel-Gaussian beams is simulated and analyzed by using the triple 
fast Fourier transform (T-FFT) algorithm. The effects of dislocation parameters, topological 
charge numbers and transmission distances of SPP and the axicon on the 
beams are considered during the simulation. The analysis shows that the off-axis higher-order 
Bessel-Gaussian beams have an uneven light intensity distribution. Due to the shift of the axicon, 
the beams will be shifted as a whole and the uneven distribution of light intensity at different 
distances is different. Different topological charge only affects the light spot expansion. 
Various combinations of the off-axis parametric values for SPP and the axicon will generate 
different light intensity distributions and even dark core's shifts. 

Key words: vortex beam, distribution of field density, spiral phase plate, topological charge number

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