Multi‐Watt Long‐Wavelength Infrared Femtosecond Lasers and Resonant Enamel Ablation
Abstract High average power broadband tunable long‐wavelength infrared (LWIR) femtosecond lasers operating at fingerprint wavelengths of 7–14 µm hold significant promise across a range of applications, including molecular hyperspectral imaging, strong‐field light‐matter interaction, and resonant tissue ablation. Here, a 6–12 µm broadband tunable parametric amplifier based on LiGaS 2 or BaGa 4 S 7 , generating an output power of 2.4 W at 7.5 µm, and 1.5 W at 9.5 µm, pumped by a simple and effective thin‐square‐rod Yb:YAG amplifier producing 110 W 274 fs output pulses is presented. As a proof of concept, efficient resonant ablation and microstructure fabrication on enamel are showcased at the hydroxyapatite resonant wavelength of 9.5 µm, with a laser intensity two orders‐of‐magnitude lower than that required by non‐resonant femtosecond lasers, which can foster more precision surgical applications with superior biosafety.
Authors
- Houkun Liang (ORCID: https://orcid.org/0000-0002-6894-0491)
- Han Wu (ORCID: https://orcid.org/0000-0003-0674-0862)
- Jianshu Li (ORCID: https://orcid.org/0000-0002-1522-7326)
- Chunmei Ding (ORCID: https://orcid.org/0000-0002-7399-3459)
- Wenkai Li
- Kan Tian (ORCID: https://orcid.org/0009-0007-4237-427X)
- Yujie Peng (ORCID: https://orcid.org/0009-0001-1899-3042)
- Linzhen He
- Weizhe Wang (ORCID: https://orcid.org/0000-0002-9105-8819)
- Xuemei Yang (ORCID: https://orcid.org/0000-0003-4005-978X)
- Dunxiang Zhang
- Jinmiao Guo
- Wenlong Li (ORCID: https://orcid.org/0009-0004-0573-4975)
- Bo Hu
- Tao Pu (ORCID: https://orcid.org/0009-0008-5918-2052)
- Yuxin Leng (ORCID: https://orcid.org/0000-0002-9086-4835)
- Shiran Sun
Institutions
- Sichuan University (CN)
- Anhui East China Institute of Optoelectronic Technology (China) (CN)
- Shanghai Institute of Optics and Fine Mechanics (CN)
Publication Details
- Journal
- Laser & Photonics Review
- Published
- 2025-01-09
- DOI
- https://doi.org/10.1002/lpor.202401856
- Citations
- 11
- Primary Topic
- Laser-Matter Interactions and Applications
- Type
- article
- Field-Weighted Citation Impact
- 13.71
Funders
- National Natural Science Foundation of China