Yb3+-doped CaF2 cubic fluoride crystal: spectroscopic properties, concentration quenching analysis, and laser optimization

G. Boulon; M. Ito; Y. Guyot; C. Goutaudier; A. Brenier; A. Jouini; H. Sato; T. Fukuda

doi:10.1117/12.755474

1 August 2007 Yb³⁺-doped CaF₂ cubic fluoride crystal: spectroscopic properties, concentration quenching analysis, and laser optimization

G. Boulon, M. Ito, Y. Guyot, C. Goutaudier, A. Brenier, A. Jouini, H. Sato, T. Fukuda

Author Affiliations +

Proceedings Volume 6785, ROMOPTO 2006: Eighth Conference on Optics; 678503 (2007) https://doi.org/10.1117/12.755474
Event: ROMOPTO 2006: Eighth Conference on Optics, 2006, Sibiu, Romania

Abstract

The ytterbium-doped crystals emitting around 1 μm under laser-diode pumping between 900-980 nm have received an increasing interest in recent years as solid-state laser materials for high power or ultra-fast lasers. In this paper, our main objective is to contribute to Yb³⁺-doped fluorides mainly on CaF₂ cubic host which are characterized by a high value of the thermal conductivity (9.5 W m^-1 K^-1) as high as YAG. Yb³⁺-doped CaF₂, mono-doped and concentration gradient fibres were grown by both, the laser heated pedestal growth (LHPG) method and by the Czochralski method. Concerning Yb³⁺ excited state dynamics, the concentration dependence of the ²F_5/2 decay time shows a competition between self-trapping and self-quenching processes. Main parameters useful for a theoretical approach of laser potentiality will be given and laser emission under InGaAs laser-diode pumping will be shown.

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G. Boulon, M. Ito, Y. Guyot, C. Goutaudier, A. Brenier, A. Jouini, H. Sato, and T. Fukuda "Yb³⁺-doped CaF₂ cubic fluoride crystal: spectroscopic properties, concentration quenching analysis, and laser optimization", Proc. SPIE 6785, ROMOPTO 2006: Eighth Conference on Optics, 678503 (1 August 2007); https://doi.org/10.1117/12.755474

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