41 W, 343 nm UV femtosecond laser based on rod-type PCF and LBO crystals
Abstract
We have demonstrated a high-power ultraviolet (UV) femtosecond laser based on an all-fiber photonic crystal fiber (PCF) laser. By combining a short, large-mode-area (LMA), high-gain silica PCF with a large-core rod-type PCF, the B-integral accumulation of the system is reduced. This ultimately enabled the generation of UV laser output at a wavelength of 343 nm, with a repetition rate of 1 MHz, pulse duration of 309 fs, average power of 41 W, and harmonic conversion efficiency of 26%. The beam quality of the UV laser is near-diffraction-limited with M 2 factors of M x 2 =1.11, M y 2 =1.12. This UV femtosecond laser source has promising applications in fields such as semiconductor wafer dicing and biomedical imaging.
Fields of Study & Subjects
Photonic Crystal and Fiber Optics
Laser-Matter Interactions and Applications
Advanced Fiber Laser Technologies
Publication details
- Journal / source
- Optics Letters
- Volume
- 51
- Issue
- 5
- Pages
- 1148–1148
- Publication date
- 5 February 2026
- Language
- EN