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Identifying the tilt angle and correcting the orbital angular momentum spectrum dispersion of misaligned light beam
The axis tilt of light beam in optical system would introduce the dispersion of orbital angular momentum (OAM) spectrum. To deal with it, a two-step method is proposed and demonstrated. First, the tilt angle of optical axis is identified with a deduced relation between the tilt angle and the variati...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5554247/ https://www.ncbi.nlm.nih.gov/pubmed/28801603 http://dx.doi.org/10.1038/s41598-017-07734-3 |
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author | Zhao, Peng Li, Shikang Wang, Yu Feng, Xue Kaiyu, Cui Fang, Liu Zhang, Wei Huang, Yidong |
author_facet | Zhao, Peng Li, Shikang Wang, Yu Feng, Xue Kaiyu, Cui Fang, Liu Zhang, Wei Huang, Yidong |
author_sort | Zhao, Peng |
collection | PubMed |
description | The axis tilt of light beam in optical system would introduce the dispersion of orbital angular momentum (OAM) spectrum. To deal with it, a two-step method is proposed and demonstrated. First, the tilt angle of optical axis is identified with a deduced relation between the tilt angle and the variation of OAM topological charges with different reference axes, which is obtained with the help of a charge coupled device (CCD) camera. In our experiments, the precision of measured tilt angle is about 10(−4) rad with topological charges of −3~3. With the measured angle value, the additional phase delay due to axis tilt can be calculated so that the dispersion of OAM spectrum can be corrected with a simple formula while the optical axis is not aligned. The experimental results indicate that the original OAM spectrum has been successfully extracted for not only the pure state but also the superposed OAM states. |
format | Online Article Text |
id | pubmed-5554247 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-55542472017-08-15 Identifying the tilt angle and correcting the orbital angular momentum spectrum dispersion of misaligned light beam Zhao, Peng Li, Shikang Wang, Yu Feng, Xue Kaiyu, Cui Fang, Liu Zhang, Wei Huang, Yidong Sci Rep Article The axis tilt of light beam in optical system would introduce the dispersion of orbital angular momentum (OAM) spectrum. To deal with it, a two-step method is proposed and demonstrated. First, the tilt angle of optical axis is identified with a deduced relation between the tilt angle and the variation of OAM topological charges with different reference axes, which is obtained with the help of a charge coupled device (CCD) camera. In our experiments, the precision of measured tilt angle is about 10(−4) rad with topological charges of −3~3. With the measured angle value, the additional phase delay due to axis tilt can be calculated so that the dispersion of OAM spectrum can be corrected with a simple formula while the optical axis is not aligned. The experimental results indicate that the original OAM spectrum has been successfully extracted for not only the pure state but also the superposed OAM states. Nature Publishing Group UK 2017-08-11 /pmc/articles/PMC5554247/ /pubmed/28801603 http://dx.doi.org/10.1038/s41598-017-07734-3 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Zhao, Peng Li, Shikang Wang, Yu Feng, Xue Kaiyu, Cui Fang, Liu Zhang, Wei Huang, Yidong Identifying the tilt angle and correcting the orbital angular momentum spectrum dispersion of misaligned light beam |
title | Identifying the tilt angle and correcting the orbital angular momentum spectrum dispersion of misaligned light beam |
title_full | Identifying the tilt angle and correcting the orbital angular momentum spectrum dispersion of misaligned light beam |
title_fullStr | Identifying the tilt angle and correcting the orbital angular momentum spectrum dispersion of misaligned light beam |
title_full_unstemmed | Identifying the tilt angle and correcting the orbital angular momentum spectrum dispersion of misaligned light beam |
title_short | Identifying the tilt angle and correcting the orbital angular momentum spectrum dispersion of misaligned light beam |
title_sort | identifying the tilt angle and correcting the orbital angular momentum spectrum dispersion of misaligned light beam |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5554247/ https://www.ncbi.nlm.nih.gov/pubmed/28801603 http://dx.doi.org/10.1038/s41598-017-07734-3 |
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