Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light
Light fields carrying orbital angular momentum (OAM) offer a broad variety of applications in which especially an accurate determination of the respective OAM spectrum, i.e., unraveling the content of OAM by its topological charge ℓ, has become a main subject. Even though various techniques have bee...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2022-08-01
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| Series: | APL Photonics |
| Online Access: | http://dx.doi.org/10.1063/5.0086536 |
| _version_ | 1798000147838271488 |
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| author | E. Otte V. Bobkova S. Trinschek C. Rosales-Guzmán C. Denz |
| author_facet | E. Otte V. Bobkova S. Trinschek C. Rosales-Guzmán C. Denz |
| author_sort | E. Otte |
| collection | DOAJ |
| description | Light fields carrying orbital angular momentum (OAM) offer a broad variety of applications in which especially an accurate determination of the respective OAM spectrum, i.e., unraveling the content of OAM by its topological charge ℓ, has become a main subject. Even though various techniques have been proposed to measure the OAM spectrum of such modes, many of them fail if optical vortices have to be considered in perturbed or dynamically changing experimental systems. Here, we put forward a novel technique capable of determining the OAM spectrum of light by a single measurement shot, which specifically applies to those fields that have been distorted. Experimentally, our technique only requires to interfere the perturbed light field with a reference field. From the resulting intensity pattern, the accurate OAM spectrum is determined in an all-digital way. We demonstrate our novel approach by numerical simulations and a proof-of-concept experiment employing a model ball lens as an exemplary disturbing object. |
| first_indexed | 2024-04-11T11:15:34Z |
| format | Article |
| id | doaj.art-d7914fd7bba8498a97a9bc7f740d9103 |
| institution | Directory Open Access Journal |
| issn | 2378-0967 |
| language | English |
| last_indexed | 2024-04-11T11:15:34Z |
| publishDate | 2022-08-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Photonics |
| spelling | doaj.art-d7914fd7bba8498a97a9bc7f740d91032022-12-22T04:27:14ZengAIP Publishing LLCAPL Photonics2378-09672022-08-0178086105086105-1210.1063/5.0086536Single-shot all-digital approach for measuring the orbital angular momentum spectrum of lightE. Otte0V. Bobkova1S. Trinschek2C. Rosales-Guzmán3C. Denz4Institute of Applied Physics, University of Muenster, Corrensstr. 2/4, 48149 Muenster, GermanyInstitute of Applied Physics, University of Muenster, Corrensstr. 2/4, 48149 Muenster, GermanyDepartment of Engineering Physics, Münster University of Applied Sciences, Stegerwaldstraße 39, 48565 Steinfurt, GermanyCentro de Investigaciones en Óptica, A.C., 37150 León, Guanajuato, MexicoInstitute of Applied Physics, University of Muenster, Corrensstr. 2/4, 48149 Muenster, GermanyLight fields carrying orbital angular momentum (OAM) offer a broad variety of applications in which especially an accurate determination of the respective OAM spectrum, i.e., unraveling the content of OAM by its topological charge ℓ, has become a main subject. Even though various techniques have been proposed to measure the OAM spectrum of such modes, many of them fail if optical vortices have to be considered in perturbed or dynamically changing experimental systems. Here, we put forward a novel technique capable of determining the OAM spectrum of light by a single measurement shot, which specifically applies to those fields that have been distorted. Experimentally, our technique only requires to interfere the perturbed light field with a reference field. From the resulting intensity pattern, the accurate OAM spectrum is determined in an all-digital way. We demonstrate our novel approach by numerical simulations and a proof-of-concept experiment employing a model ball lens as an exemplary disturbing object.http://dx.doi.org/10.1063/5.0086536 |
| spellingShingle | E. Otte V. Bobkova S. Trinschek C. Rosales-Guzmán C. Denz Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light APL Photonics |
| title | Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light |
| title_full | Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light |
| title_fullStr | Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light |
| title_full_unstemmed | Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light |
| title_short | Single-shot all-digital approach for measuring the orbital angular momentum spectrum of light |
| title_sort | single shot all digital approach for measuring the orbital angular momentum spectrum of light |
| url | http://dx.doi.org/10.1063/5.0086536 |
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