Shot-noise limited, 10 MHz swept-source optical coherence tomography for retinal imaging
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910658092597248 |
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| author | Grelet, Sacha Jimenez, Alejandro Martinez Montague, Patrick B. Podoleanu, Adrian |
| author_facet | Grelet, Sacha Jimenez, Alejandro Martinez Montague, Patrick B. Podoleanu, Adrian |
| contents | Akinetic swept-sources are essential for high-speed optical coherence tomography (OCT) imaging. Time-stretched supercontinuum (TSSC) lasers have proven to be efficient for multi-MHz swept-sources. However, lack of low-noise broadband lasers and of large dispersion devices in the water low-absorption band at 1060 nm have limited the biomedical applications of TSSC lasers. In this letter, an approach to tune the wavelength around 1050 nm over 90 nm with low-noise at 10 MHz is presented. This is based on all-normal dispersion (ANDi) supercontinuum dynamics, and employs a long chirped fiber Bragg grating (CFBG) to time-stretch a broadband pulse with a duty cycle of 93 %. Retinal images are demonstrated, with a sensitivity of 84 dB - approaching the shot noise limit. We believe this high-speed low-noise swept-source will greatly promote the development of OCT techniques for biomedical applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_15692 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Shot-noise limited, 10 MHz swept-source optical coherence tomography for retinal imaging Grelet, Sacha Jimenez, Alejandro Martinez Montague, Patrick B. Podoleanu, Adrian Optics Medical Physics Akinetic swept-sources are essential for high-speed optical coherence tomography (OCT) imaging. Time-stretched supercontinuum (TSSC) lasers have proven to be efficient for multi-MHz swept-sources. However, lack of low-noise broadband lasers and of large dispersion devices in the water low-absorption band at 1060 nm have limited the biomedical applications of TSSC lasers. In this letter, an approach to tune the wavelength around 1050 nm over 90 nm with low-noise at 10 MHz is presented. This is based on all-normal dispersion (ANDi) supercontinuum dynamics, and employs a long chirped fiber Bragg grating (CFBG) to time-stretch a broadband pulse with a duty cycle of 93 %. Retinal images are demonstrated, with a sensitivity of 84 dB - approaching the shot noise limit. We believe this high-speed low-noise swept-source will greatly promote the development of OCT techniques for biomedical applications. |
| title | Shot-noise limited, 10 MHz swept-source optical coherence tomography for retinal imaging |
| topic | Optics Medical Physics |
| url | https://arxiv.org/abs/2410.15692 |