Self-focusing and stimulated Brillouin scattering effect of low-temporal coherence light and corresponding damage characteristics in fused silica

Laser-induced damage thresholds (LIDTs) of input/exit surfaces and filamentation of fused silica under low-temporal coherence light (LTCL) and a corresponding damage mechanism are investigated. By comparing self-focusing effects of fused silica for each incident laser, the lower LIDT of filamentatio...

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Bibliographic Details
Published in:Optical materials express 2024-12, Vol.14 (12), p.2858
Main Authors: Shan, Chong, Li, Fuajian, Zhao, Xiaohui, Cui, Yong, Ji, Lailin, Wang, Erxi, He, Ruijing, Rao, Daxing, Lian, Yafei, Zhao, Yuan’an, Sui, Zhan, Gao, Yanqi
Format: Article
Language:English
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Summary:Laser-induced damage thresholds (LIDTs) of input/exit surfaces and filamentation of fused silica under low-temporal coherence light (LTCL) and a corresponding damage mechanism are investigated. By comparing self-focusing effects of fused silica for each incident laser, the lower LIDT of filamentation damage under LTCL irradiation is mainly attributed to stronger self-focusing than traditional single longitudinal mode (SLM) pulse lasers. Meanwhile, differences in LIDTs for input/exit surfaces by LTCL and SLM pulse laser irradiation are attributed to self-focusing effects and backward stimulated Brillouin scattering. Finally, influences of fused silica thickness and incident laser polarization on LIDT are demonstrated. The research contributes to exploring safe boundaries for fused silica application in high-power LTCL devices.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.537960