Analytical Framework of Orbital Angular Momentum Beam under Misaligned Detection
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866915239676608512 |
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| author | Nieminen, Arttu Ahmad, Rizwana Haas, Harald Caglayan, Humeyra |
| author_facet | Nieminen, Arttu Ahmad, Rizwana Haas, Harald Caglayan, Humeyra |
| contents | This work presents an analytical framework for modeling a detected orbital angular momentum (OAM) spectrum of an optical beam subject to tilt and lateral displacement. Firstly, we demonstrate that both types of misalignment generate OAM sidebands governed by the same functional form, each characterized by a distinct dimensionless parameter that depends on the beam's size and wavelength. Secondly, our analysis reveals that increasing the beam's topological charge broadens the detected OAM spectrum. Lastly, we show that when both tilt and lateral displacement are present, the contribution of the original OAM mode can be tuned: specifically, by orienting the tilt and displacement in perpendicular directions, the resulting misalignment effects interfere destructively, thereby reducing crosstalk. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_01723 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Analytical Framework of Orbital Angular Momentum Beam under Misaligned Detection Nieminen, Arttu Ahmad, Rizwana Haas, Harald Caglayan, Humeyra Optics This work presents an analytical framework for modeling a detected orbital angular momentum (OAM) spectrum of an optical beam subject to tilt and lateral displacement. Firstly, we demonstrate that both types of misalignment generate OAM sidebands governed by the same functional form, each characterized by a distinct dimensionless parameter that depends on the beam's size and wavelength. Secondly, our analysis reveals that increasing the beam's topological charge broadens the detected OAM spectrum. Lastly, we show that when both tilt and lateral displacement are present, the contribution of the original OAM mode can be tuned: specifically, by orienting the tilt and displacement in perpendicular directions, the resulting misalignment effects interfere destructively, thereby reducing crosstalk. |
| title | Analytical Framework of Orbital Angular Momentum Beam under Misaligned Detection |
| topic | Optics |
| url | https://arxiv.org/abs/2504.01723 |