Compact, efficient, low-threshold 320 nm continuous-wave ultraviolet laser
This paper reports a compact, efficient, low-threshold continuous-wave 320 nm ultraviolet laser based on a linear cavity with Pr:YLF and LiB3O5 (LBO) crystals. Thermal effects were analyzed via a three-dimensional temperature field model and thermal lens calculations, guiding the selection of crystal parameters that balance pump absorption and heat load. Using a 0.5 at. % doped Pr:YLF crystal of 8 mm length and a 12 mm long LBO crystal, the laser delivers 3.03 W of continuous-wave 320 nm output with a slope efficiency of 35.2% and a threshold power of 60 mW—the highest slope efficiency reported for a CW Pr:YLF laser at this wavelength. The compact linear cavity minimizes length and loss, offering a viable design for future highly integrated ultraviolet lasers using crystal bonding technology.
Authors
- Zhenwei Ou
- Wenbin Liao (ORCID: https://orcid.org/0000-0002-0226-0098)
- Jianmin Wu (ORCID: https://orcid.org/0000-0002-0999-9194)
- 祝庆轩
- Zhaojie Zhu
- Bingxuan Li (ORCID: https://orcid.org/0000-0002-6921-3448)
- J Z Zhao (ORCID: https://orcid.org/0000-0002-3573-152X)
- Shengyuan Pan
- Y D Xie
- Ge Zhang (ORCID: https://orcid.org/0000-0003-4008-9962)
- J Huang
Institutions
- Fujian Normal University (CN)
- Fujian University of Traditional Chinese Medicine (CN)
- Fujian Institute of Research on the Structure of Matter (CN)
- Tan Kah Kee Innovation Laboratory (CN)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2026-06-29
- DOI
- https://doi.org/10.1063/5.0335692
- Primary Topic
- Solid State Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Science and Technology Projects of Fujian Province
- National Natural Science Foundation of China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China