Single-Shot Phase Diversity Wavefront Sensing in Deep Turbulence via Metasurface Optics
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909362922979328 |
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| author | Jimenez, Arturo Martin Baltes, Marc Cornelius, Jackson Akozbek, Neset Coppens, Zachary |
| author_facet | Jimenez, Arturo Martin Baltes, Marc Cornelius, Jackson Akozbek, Neset Coppens, Zachary |
| contents | Free-space optical communication (FSOC) systems offer high-bandwidth and secure communication with minimal capital costs. Adaptive optics (AO) are typically added to these systems to decrease atmospheric channel losses; however, the performance of traditional AO wavefront sensors degrades in long-range, deep turbulence conditions. Alternative wavefront sensors using phase diversity can successfully reconstruct wavefronts in deep turbulence, but current implementations require bulky setups with high latency. In this work, we employ a nanostructured birefringent metasurface optic that enables low-latency phase diversity wavefront sensing in a compact form factor. We prove the effectiveness of this approach in mid-to-high turbulence (Rytov numbers from 0.2 to 0.6) through simulation and experimental demonstration. In both cases an average 16-fold increase in signal from the corrected beam is obtained. Our approach opens a pathway for compact, robust wavefront sensing that enhances range and accuracy of FSOC systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_18789 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Single-Shot Phase Diversity Wavefront Sensing in Deep Turbulence via Metasurface Optics Jimenez, Arturo Martin Baltes, Marc Cornelius, Jackson Akozbek, Neset Coppens, Zachary Optics Computer Vision and Pattern Recognition Free-space optical communication (FSOC) systems offer high-bandwidth and secure communication with minimal capital costs. Adaptive optics (AO) are typically added to these systems to decrease atmospheric channel losses; however, the performance of traditional AO wavefront sensors degrades in long-range, deep turbulence conditions. Alternative wavefront sensors using phase diversity can successfully reconstruct wavefronts in deep turbulence, but current implementations require bulky setups with high latency. In this work, we employ a nanostructured birefringent metasurface optic that enables low-latency phase diversity wavefront sensing in a compact form factor. We prove the effectiveness of this approach in mid-to-high turbulence (Rytov numbers from 0.2 to 0.6) through simulation and experimental demonstration. In both cases an average 16-fold increase in signal from the corrected beam is obtained. Our approach opens a pathway for compact, robust wavefront sensing that enhances range and accuracy of FSOC systems. |
| title | Single-Shot Phase Diversity Wavefront Sensing in Deep Turbulence via Metasurface Optics |
| topic | Optics Computer Vision and Pattern Recognition |
| url | https://arxiv.org/abs/2410.18789 |