Optimal beam displacement measurements using high-order structured light modes
Fuente:
arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910963447365632 |
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| author | Junior, A. L. S. Santos Junior, J. C. de Carvalho de Oliveira, M. Gil Cubas, E. V. S. Barros, R. F. Khoury, A. Z. Alves, G. B. |
| author_facet | Junior, A. L. S. Santos Junior, J. C. de Carvalho de Oliveira, M. Gil Cubas, E. V. S. Barros, R. F. Khoury, A. Z. Alves, G. B. |
| contents | We develop a novel technique to measure small angular and lateral displacements of structured light beams. The technique relies on using high-order Hermite-Gaussian (HG) and Laguerre-Gaussian (LG) modes, which have well-defined symmetry under inversion. We show that the displacements of such fields lead to a crosstalk with modes with opposite parity under inversion, which we measure optimally with an interferometric parity sorter. Using this technique, we achieve improvement factors of up 41 in the signal-to-noise ratio using Hermite-Gaussian modes and 21 using Laguerre-Gaussian modes with order up to 20, as compared to the fundamental Gaussian mode. Our results present a viable way of using structured light for metrology that does not demand quantum light or homodyne detection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_09065 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Optimal beam displacement measurements using high-order structured light modes Junior, A. L. S. Santos Junior, J. C. de Carvalho de Oliveira, M. Gil Cubas, E. V. S. Barros, R. F. Khoury, A. Z. Alves, G. B. Optics Quantum Physics We develop a novel technique to measure small angular and lateral displacements of structured light beams. The technique relies on using high-order Hermite-Gaussian (HG) and Laguerre-Gaussian (LG) modes, which have well-defined symmetry under inversion. We show that the displacements of such fields lead to a crosstalk with modes with opposite parity under inversion, which we measure optimally with an interferometric parity sorter. Using this technique, we achieve improvement factors of up 41 in the signal-to-noise ratio using Hermite-Gaussian modes and 21 using Laguerre-Gaussian modes with order up to 20, as compared to the fundamental Gaussian mode. Our results present a viable way of using structured light for metrology that does not demand quantum light or homodyne detection. |
| title | Optimal beam displacement measurements using high-order structured light modes |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2405.09065 |