1.
Opt Express
; 31(14): 22757-22765, 2023 Jul 03.
Artigo
em Inglês
| MEDLINE
| ID: mdl-37475379
RESUMO
We present a simple and novel technique for achieving ultra-violet (UV) wavelength-tunable laser operation in the continuous-wave regime. Wavelength tunable operation in the near infrared is obtained from a compact two-mirror Alexandrite laser cavity by temperature tuning of the laser crystal. Second-harmonic-generation to the UV is then achieved at 376-379 nm and 384-386 nm by temperature tuning of a periodically-poled lithium-niobate (PPLN) waveguide. A maximum UV power of 1.3 mW from 185 mW infra-red pump throughput is obtained from a third-order PPLN Λ=6.1µm grating. These results show promising potential for simple and wavelength tunable access to wavelengths at 360-400 nm.