期刊
OPTIK
卷 230, 期 -, 页码 -出版社
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2021.166320
关键词
Coherence optics; Vortex beams; Model purity; Laguerre-Gaussian beams
类别
资金
- National Key R&D Program of China [2018YFB0407102]
- Natural Science Foundation of Guangdong Province [2018A030310662]
- National Natural Science Foundation of China [62005041]
- Social public welfare science and technology research project of Zhongshan [2018B1026, 2018B1117]
- Youth Innovative Talent Project of Guangdong Education Department [2017KQNCX244, 2017KQNCX245]
- High Level Talent Research Starting Project in University of Electronic Science and Technology of China Zhongshan Institute [2017YKQ03, 2017YKQ04]
This paper studies the effect of spiral phase plates on the mode purity and topological charge of Laguerre-Gaussian beams derived from modulated Gaussian beams. The results suggest that SPP modulation is suitable for generating Laguerre-Gaussian beams with low topological charge.
This paper focuses on the mode purity and beam propagation properties of Gaussian vortex beams which are Gaussian beams modulated by the spiral phase plates (SPP). For a given topological charge, the Laguerre-Gaussian beam has constant mode purity during its free space propagation. However, with the increase of the topological charge, the value of the highest mode purity decays. Our results imply that the modulation of SPP to the Gaussian beam is suitable for producing Laguerre-Gaussian beams with low topological charge, rather than with high topological charge.
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