Tm3+: Bi4Si3O12 crystal as a promising laser material near 2 µm: growth, spectroscopic properties and laser performance.
Opt Express
; 29(18): 29138-29148, 2021 Aug 30.
Article
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| MEDLINE
| ID: mdl-34615030
ABSTRACT
We report on the crystal growth, spectroscopic properties and laser performance of Tm3+-doped Bi4Si3O12 (BSO) crystal. The crystal was grown by the vertical Bridgeman method. The spectroscopic properties are investigated based on absorption and luminescence spectroscopy. Judd - Ofelt (JO) analysis is performed to calculate the spontaneous emission probabilities, branching ratio and the radiative lifetimes. The absorption spectrum, emission spectrum and gain cross-section spectra of Tm3+ BSO crystal are determined for the 2 µm transition. Luminescence decay kinetic of 3F4 upper level was analysed in detail. The continuous-wave 2 µm laser with a maximum output power of 650 mW and a slope efficiency of 29.7% is demonstrated for the first time. The beam quality factor (M2) of Tm3+ BSO laser was about 1.03 at the maximum output level.
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MEDLINE
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En
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Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2021
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Article