Talbot interference of whispering gallery modes
The Talbot self-imaging phenomenon is a fundamental interference effect that is natural to all waves with a periodic structure. We theoretically and experimentally study the Talbot effect for optical waves in the transverse angular domain using whispering-gallery modes of step-index multimode fibers...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2025-01-01
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| Series: | APL Photonics |
| Online Access: | http://dx.doi.org/10.1063/5.0235206 |
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| author | Matias Eriksson Benjamin A. Stickler Robert Fickler |
| author_facet | Matias Eriksson Benjamin A. Stickler Robert Fickler |
| author_sort | Matias Eriksson |
| collection | DOAJ |
| description | The Talbot self-imaging phenomenon is a fundamental interference effect that is natural to all waves with a periodic structure. We theoretically and experimentally study the Talbot effect for optical waves in the transverse angular domain using whispering-gallery modes of step-index multimode fibers, which carry a high orbital angular momentum and fulfill the required quadratic dispersion relation. By using the complex interference along the core–cladding interface of these fibers, we experimentally demonstrate that the high-order fractional Talbot effect can be used to implement 9- and 30-port beam splitters using only off-the-shelf components in a compact arrangement. In addition, we show that the beam splitters can be efficiently interfaced with single-mode fibers, such that our work not only extends the recent developments on the angular Talbot effect to widely available step-index multimode fibers but also demonstrates a powerful application as a signal multiplexer, which becomes more compact as the number of channels is increased. |
| format | Article |
| id | doaj-art-42dbc3ac8653431db4f40c5502c7e91c |
| institution | Kabale University |
| issn | 2378-0967 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Photonics |
| spelling | doaj-art-42dbc3ac8653431db4f40c5502c7e91c2025-02-03T16:36:22ZengAIP Publishing LLCAPL Photonics2378-09672025-01-01101010804010804-710.1063/5.0235206Talbot interference of whispering gallery modesMatias Eriksson0Benjamin A. Stickler1Robert Fickler2Tampere University, Photonics Laboratory, Physics Unit, 33720 Tampere, FinlandInstitute for Complex Quantum Systems, Ulm University, Albert-Einstein-Allee 11, 89069 Ulm, GermanyTampere University, Photonics Laboratory, Physics Unit, 33720 Tampere, FinlandThe Talbot self-imaging phenomenon is a fundamental interference effect that is natural to all waves with a periodic structure. We theoretically and experimentally study the Talbot effect for optical waves in the transverse angular domain using whispering-gallery modes of step-index multimode fibers, which carry a high orbital angular momentum and fulfill the required quadratic dispersion relation. By using the complex interference along the core–cladding interface of these fibers, we experimentally demonstrate that the high-order fractional Talbot effect can be used to implement 9- and 30-port beam splitters using only off-the-shelf components in a compact arrangement. In addition, we show that the beam splitters can be efficiently interfaced with single-mode fibers, such that our work not only extends the recent developments on the angular Talbot effect to widely available step-index multimode fibers but also demonstrates a powerful application as a signal multiplexer, which becomes more compact as the number of channels is increased.http://dx.doi.org/10.1063/5.0235206 |
| spellingShingle | Matias Eriksson Benjamin A. Stickler Robert Fickler Talbot interference of whispering gallery modes APL Photonics |
| title | Talbot interference of whispering gallery modes |
| title_full | Talbot interference of whispering gallery modes |
| title_fullStr | Talbot interference of whispering gallery modes |
| title_full_unstemmed | Talbot interference of whispering gallery modes |
| title_short | Talbot interference of whispering gallery modes |
| title_sort | talbot interference of whispering gallery modes |
| url | http://dx.doi.org/10.1063/5.0235206 |
| work_keys_str_mv | AT matiaseriksson talbotinterferenceofwhisperinggallerymodes AT benjaminastickler talbotinterferenceofwhisperinggallerymodes AT robertfickler talbotinterferenceofwhisperinggallerymodes |