1.
Opt Express
; 29(3): 4240-4248, 2021 Feb 01.
Artículo
en Inglés
| MEDLINE
| ID: mdl-33771008
RESUMEN
We present the first frequency-quadrupled linearly-polarized Q-switched neodymium-doped fiber laser generating > 500â mW average power at 226â nm. For this purpose, an amplified Q-switched oscillator using novel large-mode-area (LMA) fibers and generating up to 24 W average power (15â kW peak power) at 905â nm was developed. Two nonlinear frequency conversion stages using a LBO crystal for SHG and a BBO crystal for FHG generate respectively up to 4.9 W average power in the deep blue at 452â nm and a maximum of 510â mW average power in the deep ultra-violet (DUV) at 226â nm. Performance limitations and further improvements are discussed.