Crystal growth, polarized spectral properties, and 2.3â
µm laser performance of Tm:LuVO4 crystal.
Opt Express
; 32(11): 19611-19625, 2024 May 20.
Article
em En
| MEDLINE
| ID: mdl-38859092
ABSTRACT
We report on the Czochralski crystal growth, polarized optical spectroscopy, and the first continuous-wave laser operation of 1.5 at.% TmLuVO4 crystal on the 3H4 â 3H5 transition. The polarized absorption and stimulated-emission properties of Tm3+ ions in LuVO4 were revised and the crystal-field splitting of the Tm3+ multiplets was determined by low-temperature (12â
K) spectroscopy. The maximum stimulated-emission cross-section for the 3H4 â 3H5 transition is 2.48 × 10-20 cm2 at 2363â
nm for π-polarization corresponding to an emission bandwidth of 28â
nm. Evidence of phonon-assisted emissions of Tm3+ ions above 2â
µm is presented. The broadband emission properties of the TmLuVO4 crystal make it promising for ultrashort pulse generation. Additionally, pumped by a 796â
nm fiber-coupled laser diode, the TmLuVO4 laser generated a Watt-level output power at 2279-2295â
nm with a slope efficiency of 9.2% and linearly polarized emission (π-polarization).
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MEDLINE
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En
Ano de publicação:
2024
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Article