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Analysis of Tungstates and Sesquioxides, Two of the Best Yb3+-Doped Laser Crystals According to Different Evaluations.

Published online by Cambridge University Press:  21 March 2011

Georges Boulon ,
Alain Brenier ,
Laetitia Laversenne ,
Yannick Guyot ,
Christelle Goutaudier ,
Marie-Thérèse Cohen-Adad ,
Gérard Métrat  and
Noelle Muhlstein
Georges Boulon
Affiliation:
Physical Chemistry of Luminescent Materials, Claude Bernard/Lyon1 University, UMR 5620 CNRS, Bât. A.Kastler,10 rue Ampère, Domaine Scientifique de la Doua, 69622 Villeurbanne, France
Alain Brenier
Affiliation:
Physical Chemistry of Luminescent Materials, Claude Bernard/Lyon1 University, UMR 5620 CNRS, Bât. A.Kastler,10 rue Ampère, Domaine Scientifique de la Doua, 69622 Villeurbanne, France
Laetitia Laversenne
Affiliation:
Physical Chemistry of Luminescent Materials, Claude Bernard/Lyon1 University, UMR 5620 CNRS, Bât. A.Kastler,10 rue Ampère, Domaine Scientifique de la Doua, 69622 Villeurbanne, France
Yannick Guyot
Affiliation:
Physical Chemistry of Luminescent Materials, Claude Bernard/Lyon1 University, UMR 5620 CNRS, Bât. A.Kastler,10 rue Ampère, Domaine Scientifique de la Doua, 69622 Villeurbanne, France
Christelle Goutaudier
Affiliation:
Physical Chemistry of Luminescent Materials, Claude Bernard/Lyon1 University, UMR 5620 CNRS, Bât. A.Kastler,10 rue Ampère, Domaine Scientifique de la Doua, 69622 Villeurbanne, France
Marie-Thérèse Cohen-Adad
Affiliation:
Physical Chemistry of Luminescent Materials, Claude Bernard/Lyon1 University, UMR 5620 CNRS, Bât. A.Kastler,10 rue Ampère, Domaine Scientifique de la Doua, 69622 Villeurbanne, France
Gérard Métrat
Affiliation:
Physical Chemistry of Luminescent Materials, Claude Bernard/Lyon1 University, UMR 5620 CNRS, Bât. A.Kastler,10 rue Ampère, Domaine Scientifique de la Doua, 69622 Villeurbanne, France
Noelle Muhlstein
Affiliation:
Physical Chemistry of Luminescent Materials, Claude Bernard/Lyon1 University, UMR 5620 CNRS, Bât. A.Kastler,10 rue Ampère, Domaine Scientifique de la Doua, 69622 Villeurbanne, France
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Abstract

The development of reliable InGaAs laser diode pump sources emitting in the 900-980 nm spectral range is stongly influencing the field of lasers based on Yb3+-doped solid state crystals. Ca5(PO4)3F (C-FAP) and S-FAP (Sr5(PO4)3F) were soon recognized to be favourable hosts for Yb3+ lasing in the nanosecond pulse regime. This fact was supported by an evaluation of the spectroscopic properties of several Yb3+-doped crystals useful for laser action. This evaluation is based on two parameters known from spectroscopy, the emission cross-section at the laser wavelength and the minimum pump intensity required to achieve transparency at the laser wavelength.We think there is a need of a new evaluation of Yb3+-doped crystals in order to predict the laser efficiency in a more realistic manner in different kinds of regimes. We present here the main spectroscopic properties of two Yb3+-doped laser crystals which are grown in our Group: (i) KY(WO4)2 double tungstates by the Floating Crystal method and (ii) Y2O3sesquioxides by the Laser Heated Pedestal Growth method. The approach, based on a quasi-three level laser model, leads to compare all known Yb3+-doped crystals in a two-dimensional diagram considering the laser extracted power and the slope efficiency. We shall show that tungstates and sesquioxides belong to the highest laser crystal potential in CW-end pumping configuration.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 667: Symposium G – Luminescence and Luminescent Materials , 2001 , G2.1
Copyright
Copyright © Materials Research Society 2001

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References

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