Realizing High-order Bessel Vortex Beams with High-level Phase Holograms

2019 2nd International Conference on Advanced Materials, Intelligent Manufacturing and Automation

Zhai, Zhongsheng^1 ; Huang, Jiaojie^1 ; Cheng, Zhuang^1 ; Lv, Qinghua^2 ; Wang, Xuanze^1

School of Mechanical Engineering, Hubei University of Technology, Wuhan, Hubei

430068, China^1

chn, Wuhan, Hubei

430068, Wuhan, Hubei^2

关键词: Beam modulation;    Combination method;    Modulation effects;    Phase holograms;    Precision measurement;    Spatial light modulators;    Spiral phase plates;    Superposition method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/569/3/032039/pdf
DOI  :  10.1088/1757-899X/569/3/032039

来源: IOP

【 摘 要 】

High-order Bessel beams are widely used in laser processing and precision measurement. For the realization of high-order Bessel beams, a spatial light modulator is used to load the high-order phase hologram instead of the real spiral phase plate and the axicon. The distribution of light field in two modes of axicon combination and phase superposition is analyzed theoretically. The beam modulation in two modes is designed and compared experimentally. The results show that the modulation effect of the phase superposition method is better than that of the axicon combination method. Meanwhile, the operation is flexible and the manufacture errors can be reduced. It is an effective method for realizing high-order Bessel beams.