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5 March 2018 Investigation on filter method for smoothing spiral phase plate
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Proceedings Volume 10710, Young Scientists Forum 2017; 1071040 (2018)
Event: Young Scientists Forum 2017, 2017, Shanghai, China
Spiral phase plate (SPP) for generating vortex hollow beams has high efficiency in various applications. However, it is difficult to obtain an ideal spiral phase plate because of its continuous-varying helical phase and discontinued phase step. This paper describes the demonstration of continuous spiral phase plate using filter methods. The numerical simulations indicate that different filter method including spatial domain filter, frequency domain filter has unique impact on surface topography of SPP and optical vortex characteristics. The experimental results reveal that the spatial Gaussian filter method for smoothing SPP is suitable for Computer Controlled Optical Surfacing (CCOS) technique and obtains good optical properties.
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Yuanhang Zhang, Shenglin Wen, Zijian Luo, Caixue Tang, Hao Yan, Chunlin Yang, Mincai Liu, Qinghua Zhang, and Jian Wang "Investigation on filter method for smoothing spiral phase plate", Proc. SPIE 10710, Young Scientists Forum 2017, 1071040 (5 March 2018);

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