https://doi.org/10.1140/epjd/s10053-023-00723-4
Regular Article – Optical Phenomena and Photonics
Tests of optical vortex detection based on the Talbot effect at fractional Talbot lengths and with grating rotation: realization for practical uses
1
Department of Physics, Faculty of Science, Burapha University, 20131, Sean Suk, ChonBuri Province, Thailand
2
Quantum and Nano Optics Research Unit, Burapha University, 20131, Sean Suk, ChonBuri Province, Thailand
Received:
31
March
2023
Accepted:
3
July
2023
Published online:
15
July
2023
The optical vortex (OV) beam which has orbital angular momentum states was detected using the Talbot effect. The results clearly demonstrated the identification of the order and charge of the vortices. However, this technical detection was performed at the Talbot length and multiples thereof. This detection technique is now extended to fractional Talbot lengths. The results confirm that the best measurement contrast is still at periodic multiples of the Talbot length. In addition, the grating rotation has been realized. The grating rotation, that is, the rotation of the interference fringes, has no effect on the tilted dark stripes used to determine the order and charge of the OV beam. The direction of the tilted dark stripes is still aligned with the interference patterns. This makes the Talbot detection method more convenient and flexible for uses in optical applications.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
