12 October 2015 Adaptive position detection of optical vortex using a Shack-Hartmann wavefront sensor
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Proceedings Volume 9633, Optifab 2015; 96332A (2015) https://doi.org/10.1117/12.2195693
Event: SPIE Optifab, 2015, Rochester, New York, United States
Abstract
The low intensity regions existed around the singular point of optical vortex (OV) beams influence the position detection accuracy of phase singular points, especially for OVs of large topological charge. A new method using Shack-Hartmann wavefront sensor (SH-WFS) is proposed to solve this problem. In the method, we combine several phase slopes obtained at individual lenses of a lens array into one to avoid the influence of the low intensity region and use correlation matching with pre-calculated simulation data to get the accurate singular point position. The experimental results show that the position detection precision of this method is maintained less than 0.2 in unit of lens-size for OVs of charges -20 to 20.
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Jia Luo, Jia Luo, Hongxin Huang, Hongxin Huang, Yoshinori Matsui, Yoshinori Matsui, Haruyoshi Toyoda, Haruyoshi Toyoda, Takashi Inoue, Takashi Inoue, Jian Bai, Jian Bai, } "Adaptive position detection of optical vortex using a Shack-Hartmann wavefront sensor", Proc. SPIE 9633, Optifab 2015, 96332A (12 October 2015); doi: 10.1117/12.2195693; https://doi.org/10.1117/12.2195693
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