Open AccessLinearly-polarized pulsed Nd-doped fiber MOPA at 905 nm and frequency conversion to deep-UV at 226 nm
Author(s) -
Kilian Le Corre,
Thierry Robin,
Alexandre Barnini,
Louanne Kervella,
Pascal Guitton,
Benoît Cadier,
Giorgio Santarelli,
H. Gilles,
Sylvain Girard,
Mathieu Laroche
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.416570
Subject(s) - materials science , optics , fiber laser , laser , energy conversion efficiency , optoelectronics , neodymium , deep blue , doping , crystal (programming language) , fiber , photonic crystal fiber , power (physics) , nonlinear optics , wavelength , physics , chemistry , photochemistry , quantum mechanics , computer science , composite material , programming language
We present the first frequency-quadrupled linearly-polarized Q-switched neodymium-doped fiber laser generating > 500 mW average power at 226 nm. For this purpose, an amplified Q-switched oscillator using novel large-mode-area (LMA) fibers and generating up to 24 W average power (15 kW peak power) at 905 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 452 nm and a maximum of 510 mW average power in the deep ultra-violet (DUV) at 226 nm. Performance limitations and further improvements are discussed.