New topological charge parallel measurement method of optical vortex based on computer-generated holography

Liu, X., Sujuan, H., Wancai, X., Zhonghua, P.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Xianpeng Liu, Sujuan Huang, Wancai Xie, Zhonghua Pei. New topological charge parallel measurement method of optical vortex based on computer-generated holography (Новый метод параллельного измерения топологического заряда в оптических вихрях на основе компьютерной голографии) [на англ. яз.] // Оптический журнал. 2022. Т. 89. № 2. С. 43–51. http://doi.org/10.17586/1023-5086-2022-89-02-43-51

Xianpeng Liu, Sujuan Huang, Wancai Xie, Zhonghua Pei. New topological charge parallel measurement method of optical vortex based on computer-generated holography (Новый метод параллельного измерения топологического заряда в оптических вихрях на основе компьютерной голографии) [in English] // Opticheskii Zhurnal. 2022. V. 89. № 2. P. 43–51. http://doi.org/10.17586/1023-5086-2022-89-02-43-51

For citation (Journal of Optical Technology):

Xianpeng Liu, Sujuan Huang, Wancai Xie, and Zhonghua Pei, "Topological charge parallel measurement method for optical vortices based on computer-generated holography," Journal of Optical Technology. 89(2), 94-100 (2022). https://doi.org/10.1364/JOT.89.000094

Abstract:

The generation, propagation, and application of optical vortex have been major researched topics in recent years. In this study, a parallel measurement approach is presented to analyze the topological charge of single and composite optical vortices with the help of the spatial light modulator. The topological charges of single and composite optical vortices are measured by observing the Gaussian point position of the diffracted field, which solves the difficult problem of measuring the composite optical vortex and the optical vortex with large topological charge. The presented method is feasible and has strong expansibility. More composite optical vortex can be measured easily by using different computer-generated holography. When the optical vortex is measured correctly, it can present a Gaussian point, which retains the characteristics of optical vortex. Therefore, this point will be important in the optical vortex communication.

Keywords:

optical vortex, parallel measurement, computer-generated hologram

Acknowledgements:

This work was funded by the National Natural Science Foundation of China (NSFC) (61475098). This work was supported by 111 Project (D20031).

OCIS codes: 090.1995, 200.4740

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