Adaptive position detection of optical vortex using a Shack-Hartmann wavefront sensor

Jia Luo; Hongxin Huang; Yoshinori Matsui; Haruyoshi Toyoda; Takashi Inoue; Jian Bai

doi:10.1117/12.2195693

12 October 2015 Adaptive position detection of optical vortex using a Shack-Hartmann wavefront sensor

Jia Luo, Hongxin Huang, Yoshinori Matsui, Haruyoshi Toyoda, Takashi Inoue, Jian Bai

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.

Citation Download Citation

Jia Luo, Hongxin Huang, Yoshinori Matsui, Haruyoshi Toyoda, Takashi Inoue, and Jian Bai "Adaptive position detection of optical vortex using a Shack-Hartmann wavefront sensor", Proc. SPIE 9633, Optifab 2015, 96332A (12 October 2015); https://doi.org/10.1117/12.2195693

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KEYWORDS

Spiral phase plates

Wavefront sensors

Optical vortices

Beam splitters

Collimation

Spatial light modulators

Spatial resolution

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