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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2508.04121 |
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| _version_ | 1866909724130148352 |
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| author | Wu, Zhaohui Zeng, Xiaoming Li, Zhaoli Wang, Xiaodong Wang, Xiao Mu, Jie Zuo, Yanlei Zhou, Kainan Peng, Hao Riconda, C. Weber, S. |
| author_facet | Wu, Zhaohui Zeng, Xiaoming Li, Zhaoli Wang, Xiaodong Wang, Xiao Mu, Jie Zuo, Yanlei Zhou, Kainan Peng, Hao Riconda, C. Weber, S. |
| contents | Material damage thresholds pose a fundamental limit to chirped pulse amplification (CPA) in high-power laser systems. Plasma-based amplification via stimulated Brillouin scattering (SBS) offers a damage-free alternative, yet its effectiveness has been hindered by instabilities that constrain interaction length. In this study, we report the first experimental demonstration of SBS amplification driven by a flying focus in a 3-mm plasma channel. The flying focus is generated using chromatic aberration from spherical lenses, with its velocity precisely measured by an interferometric ionization method achieving 6.6 fs timing resolution. At a focus velocity near -c, SBS amplification is realized at pump and seed intensities more than two orders of magnitude lower than in conventional setups, yielding a conversion efficiency of 14.5%. These results validate flying focus as a powerful tool for extending interaction lengths and enabling efficient plasma-based laser amplification at reduced intensities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_04121 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stimulated Brillouin Amplification with Flying Focus Wu, Zhaohui Zeng, Xiaoming Li, Zhaoli Wang, Xiaodong Wang, Xiao Mu, Jie Zuo, Yanlei Zhou, Kainan Peng, Hao Riconda, C. Weber, S. Plasma Physics Material damage thresholds pose a fundamental limit to chirped pulse amplification (CPA) in high-power laser systems. Plasma-based amplification via stimulated Brillouin scattering (SBS) offers a damage-free alternative, yet its effectiveness has been hindered by instabilities that constrain interaction length. In this study, we report the first experimental demonstration of SBS amplification driven by a flying focus in a 3-mm plasma channel. The flying focus is generated using chromatic aberration from spherical lenses, with its velocity precisely measured by an interferometric ionization method achieving 6.6 fs timing resolution. At a focus velocity near -c, SBS amplification is realized at pump and seed intensities more than two orders of magnitude lower than in conventional setups, yielding a conversion efficiency of 14.5%. These results validate flying focus as a powerful tool for extending interaction lengths and enabling efficient plasma-based laser amplification at reduced intensities. |
| title | Stimulated Brillouin Amplification with Flying Focus |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2508.04121 |