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Koerner, Jörg; Krueger, Mathias; Reiter, Jürgen; Muenzer, Andreas; Hein, Joachim; Kaluza, Malte C. (2020): Temperature dependent spectroscopic study of Yb3+-doped KG(WO4)(2), KY(WO4)(2), YAlO3 and YLiF4 for laser applications. In: Optical Materials Express, Vol. 10, No. 10: pp. 2425-2438
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We present a study on temperature dependent spectroscopic data for Yb:KGW, Yb:KYW and Yb:YLF between 80 K and 280 K and Yb:YAP between 100K and 300 K. Absorption and emission cross sections are determined. The latter ones are obtained by using a combination of the McCumber relation and the Fiichtbauer-Ladenburg equation. Fluorescence lifetimes are measured within a setup optimized for the suppression of re-absorption and compared to the radiative lifetimes calculated from the previously determined cross sections to cross check the validity of the measurements. The cross sections are evaluated with regard to the materials' potential for supporting the generation of ultra-short laser pulses, low quantum defect lasing and requirements for suitable diode laser pump sources. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement