Measuring orbital angular momentum of vortex beams with double multipoint and ring slit interferometer

Qi Zhao; Hao Zhang; Yuanjie Yang

doi:10.1117/12.2644812

19 December 2022 Measuring orbital angular momentum of vortex beams with double multipoint and ring slit interferometer

Qi Zhao, Hao Zhang, Yuanjie Yang

Proceedings Volume 12319, Optical Metrology and Inspection for Industrial Applications IX; 123191S (2022) https://doi.org/10.1117/12.2644812
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

Recently, the method of multipoint interferometer (MI) was proposed to detect the orbital angular momentum (OAM), which could be used for measuring OAM of light from astronomical sources. However, this method is limit to low topological charge, because the interference pattern can repeat periodically. In order to solve this problem, we proposed an improved multipoint interferometer method (IMI) capable of measuring the OAM of optical vortex with arbitrary topological charge. However, the method of IMI is limited by complex interference patterns detection difficult. To overcome these disadvantages of MI and IMI, we proposed a method called DRI using screen plate with a binary ring slit and two pinholes. This method is demonstrated viability theoretically

Citation Download Citation

Qi Zhao, Hao Zhang, and Yuanjie Yang "Measuring orbital angular momentum of vortex beams with double multipoint and ring slit interferometer", Proc. SPIE 12319, Optical Metrology and Inspection for Industrial Applications IX, 123191S (19 December 2022); https://doi.org/10.1117/12.2644812

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