Optical vortex beams generated by a phase-only LC-SLM and double-slit interference analysis

Dong Chen; Junli Qi; Weihua Wang; Jinhong Yang; Ping Wang; Qianghua Zhang; Haifei Deng; Hui Zhang; Dewei Sun; Huihui Shan; Xiaomin Ma; Bo Shi

doi:10.1117/12.2034770

31 December 2013 Optical vortex beams generated by a phase-only LC-SLM and double-slit interference analysis

Dong Chen, Junli Qi, Weihua Wang, Jinhong Yang, Ping Wang, Qianghua Zhang, Haifei Deng, Hui Zhang, Dewei Sun, Huihui Shan, Xiaomin Ma, Bo Shi

Author Affiliations +

Proceedings Volume 9042, 2013 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments; 90420T (2013) https://doi.org/10.1117/12.2034770
Event: International Conference on Optical Instruments and Technology (OIT2013), 2013, Beijing, China

Abstract

Vortex beams with integral and fractional topological charges are generated by an experimental setup with one phase-only liquid crystal spatial light modulator which efficiently modulates the phase retardation distributions of input beam. The intensity distributions and double-slit interference of vortex beams with integral and fractional topological charges are investigated in detail. Tilt appears in double-slit interference fringes of vortex beams. The fringe tilt amounts in the intermediate region are proportional to the topological charge l of vortex beams. The double-slit interference method can be utilized to determine the topological charge of vortex beams.

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Dong Chen, Junli Qi, Weihua Wang, Jinhong Yang, Ping Wang, Qianghua Zhang, Haifei Deng, Hui Zhang, Dewei Sun, Huihui Shan, Xiaomin Ma, and Bo Shi "Optical vortex beams generated by a phase-only LC-SLM and double-slit interference analysis", Proc. SPIE 9042, 2013 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 90420T (31 December 2013); https://doi.org/10.1117/12.2034770

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KEYWORDS

Spiral phase plates

Phase shift keying

Modulation

Liquid crystals

Optical vortices

Refraction

Gaussian beams

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