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9 July 2013 Fluoride crystals: materials for near-infrared solid state lasers
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Proceedings Volume 8786, Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers; 878614 (2013)
Event: SPIE/SIOM Pacific Rim Laser Damage: Optical Materials for High-Power Lasers, 2013, Shanghai, China
In this work we present an overview of the best 2μm laser results obtained in Tm-doped fluoride hosts LiYF4(YLF), LiLuF4 (LLF) and BaY2F8 (BYF) and we report on the growth, spectroscopy and first laser test emission of a novel mixed material BaYLuF8 (BYLF), interesting as a variant of BYF material with a partial substitution of Y3+ ions by Lu3+. The novel host is interesting mainly because indications are that the mixed crystal would be sturdier than BYF. The addition of Lutetium would improve the thermo-mechanical properties going into the direction of high power applications, as suggest from works on YLF and its isomorph LLF. A detailed description of Czochralski growth of fluoride laser materials is provided, focusing on the growth parameters of the novel BYLF:Tm3+12% material grown. With regard of spectroscopy analysis, we report on the results obtained with BYLF host. Detailed absorption, fluorescence and lifetime measurements have been performed focusing on the 3H4 and 3F4 manifolds, the pumping and upper laser level. Moreover diode pumped CW laser emission at 2 μm has been achieved in BYLF: Tm3+12% sample obtaining a slope efficiency of about 28% with respect to the absorbed power.
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Daniela Parisi, Stefano Veronesi, Azzurra Volpi, Mauro Gemmi, Mauro Tonelli, Arlete Cassanho, and Hans P. Jenssen "Fluoride crystals: materials for near-infrared solid state lasers", Proc. SPIE 8786, Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers, 878614 (9 July 2013);

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