| Autor: |
Yang, Xuemei, Zhang, Dunxiang, Wang, Weizhe, Tian, Kan, He, Linzhen, Guo, Jinmiao, Hu, Bo, Pu, Tao, Li, Wenlong, Sun, Shiran, Ding, Chunmei, Wu, Han, Li, Kenkai, Peng, Yujie, Li, Jianshu, Leng, Yuxin, Liang, Houkun |
| Rok vydání: |
2024 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| Popis: |
High-power broadband tunable long-wavelength infrared (LWIR) femtosecond lasers operating at fingerprint wavelengths of 7-14 {\mu}m hold significant promise across a range of applications, including molecular hyperspectral imaging, strong-field light-matter interaction, and resonant tissue ablation. Here we present 6-12 {\mu}m broadband tunable parametric amplifier based on LiGaS2 or BaGa4S7, generating new record output power of 2.4 W at 7.5 {\mu}m, and 1.5 W at 9.5 {\mu}m, pumped by a simple and effective thin-square-rod Yb:YAG amplifier producing 110 W 274 fs output pulses. As a proof of concept, we showcase efficient resonant ablation and microstructure fabrication on enamel at the hydroxyapatite resonant wavelength of 9.5 {\mu}m, with a laser intensity two orders-of-magnitude lower than that required by non-resonant femtosecond lasers, which could foster more precision surgical applications with superior biosafety. |
| Databáze: |
arXiv |
| Externí odkaz: |
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