Open AccessWavelength diversification of high-power external cavity diamond Raman lasers using intracavity harmonic generation
Author(s) -
Hadiya Jasbeer,
Robert J. Williams,
Ondřej Kitzler,
Aaron McKay,
Richard P. Mildren
Publication year - 2018
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.26.001930
Subject(s) - materials science , optics , lithium triborate , laser , energy conversion efficiency , optoelectronics , raman laser , laser beam quality , second harmonic generation , diamond , raman spectroscopy , continuous wave , raman scattering , laser beams , physics , composite material
We report a high power quasi-continuous-wave (QCW) 620 nm laser from an external cavity diamond Raman laser utilizing intracavity frequency doubling in lithium triborate. Output power of 30 W for durations of 0.25 ms at 15% conversion efficiency was achieved with a beam quality factor M 2 = 1.1 from a free-running Nd:YAG pump laser of M 2 = 1.5. The critical design parameters that affect conversion efficiency and power were analysed with the aid of an analytical model. By adaptation to other pump technologies, the diamond approach provides a novel pathway towards high brightness CW beam generation in the visible and ultraviolet regions.