Abstract
We report on continuous-wave laser operation of ${{\rm Tb}^{3 +}}{:}{{\rm LiLuF}_4}$ under UV pumping. More than five times higher absorption cross sections in the UV allow for shorter gain media, which are required for future high-power diode pumping. The cross-relaxation process is found to efficiently populate the upper laser level $^5{{\rm D}_4}$ at doping concentrations typically used in ${{\rm Tb}^{3 +}}$-doped gain media. Pumping with a frequency doubled Ti:sapphire laser at 359 nm enables laser operation in the green and yellow spectral range with slope efficiencies of 41% and 20%, respectively, at optical-to-optical efficiencies a factor of two higher than under cyan-blue pumping.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Moritz Badtke, Sascha Kalusniak, Hiroki Tanaka, and Christian Kränkel
Opt. Lett. 48(13) 3379-3382 (2023)
H. Chen, W. Yao, H. Uehara, and R. Yasuhara
Opt. Lett. 45(9) 2596-2599 (2020)
Esrom Kifle, Florent Starecki, Pavel Loiko, Solenn Cozic, Franck Joulain, Thibaud Berthelot, Thierry Georges, Dragan Stojcevski, Damien Deubel, and Patrice Camy
Opt. Lett. 46(1) 74-77 (2021)