ThuliumV1, Main, Exploration, bibRecord, 002215

Energy-transfer processes in Yb:Tm-doped KY3F10, LiYF4, and BaY2F8 single crystals for laser operation at 1.5 and 2.3 μm

Identifieur interne : 002215 ( Main/Exploration ); précédent : 002214; suivant : 002216

Energy-transfer processes in Yb:Tm-doped KY3F10, LiYF4, and BaY2F8 single crystals for laser operation at 1.5 and 2.3 μm

Auteurs : A. Braud [France, Russie] ; S. Girard [France] ; J. L. Doualan [France] ; M. Thuau [France] ; R. Moncorge [France] ; A. M. Tkachuk [France]

Source :

Physical review. B, Condensed matter [ 0163-1829 ] ; 2000-02-15.

RBID : Pascal:00-0089039

Descripteurs français

Pascal (Inist)
- 4255R, 4255X, 4270H, 3250, Etude expérimentale, Etude théorique, Potassium composé, Lithium composé, Baryum composé, Ytterbium, Thulium, Laser solide, Etat impureté, Structure bande.

English descriptors

KwdEn :
- Band structure, Barium compounds, Experimental study, Impurity states, Lithium compounds, Potassium compounds, Solid state lasers, Theoretical study, Thulium, Ytterbium.

Abstract

Energy-transfer processes have been quantitatively studied in various Tm:Yb-doped fluoride crystals. A comparison between the three host crystals which have been examined (KY₃F₁₀, LiYF₄, and BaY₂F₈) shows clearly that the efficiency of the Yb→Tm energy transfers is larger in KY₃F₁₀ than in LiYF₄ or BaY₂F₈. The dependence of the energy-transfer parameters upon the codopant concentrations has been experimentally measured and compared with the results calculated on the basis of migration-assisted energy-transfer models. Using these energy-transfer parameters and a rate equation model, we have performed a theoretical calculation of the laser thresholds for the ³H₄→³F₄ and ³H₄→³H₅ laser transitions of the Tm ion around 1.5 and 2.3 μm, respectively. Laser experiments performed at 1.5 μm in Yb:Tm:LiYF₄ then led to laser threshold values in good agreement with those derived theoretically. Based on these results, optimized values for the Yb and Tm dopant concentrations for typical values of laser cavity and pump modes were finally derived to minimize the threshold pump powers for the laser transitions around 1.5 and 2.3 μm.

Affiliations:

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Le document en format XML

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F<sub>8</sub>
 single crystals for laser operation at 1.5 and 2.3 μm</title>
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F<sub>10</sub>
, LiYF<sub>4</sub>
, and BaY<sub>2</sub>
F<sub>8</sub>
 single crystals for laser operation at 1.5 and 2.3 μm</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Band structure</term>
<term>Barium compounds</term>
<term>Experimental study</term>
<term>Impurity states</term>
<term>Lithium compounds</term>
<term>Potassium compounds</term>
<term>Solid state lasers</term>
<term>Theoretical study</term>
<term>Thulium</term>
<term>Ytterbium</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>4255R</term>
<term>4255X</term>
<term>4270H</term>
<term>3250</term>
<term>Etude expérimentale</term>
<term>Etude théorique</term>
<term>Potassium composé</term>
<term>Lithium composé</term>
<term>Baryum composé</term>
<term>Ytterbium</term>
<term>Thulium</term>
<term>Laser solide</term>
<term>Etat impureté</term>
<term>Structure bande</term>
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<front><div type="abstract" xml:lang="en">Energy-transfer processes have been quantitatively studied in various Tm:Yb-doped fluoride crystals. A comparison between the three host crystals which have been examined (KY<sub>3</sub>
F<sub>10</sub>
, LiYF<sub>4</sub>
, and BaY<sub>2</sub>
F<sub>8</sub>
) shows clearly that the efficiency of the Yb→Tm energy transfers is larger in KY<sub>3</sub>
F<sub>10</sub>
 than in LiYF<sub>4</sub>
 or BaY<sub>2</sub>
F<sub>8</sub>
. The dependence of the energy-transfer parameters upon the codopant concentrations has been experimentally measured and compared with the results calculated on the basis of migration-assisted energy-transfer models. Using these energy-transfer parameters and a rate equation model, we have performed a theoretical calculation of the laser thresholds for the <sup>3</sup>
H<sub>4</sub>
→<sup>3</sup>
F<sub>4</sub>
 and <sup>3</sup>
H<sub>4</sub>
→<sup>3</sup>
H<sub>5</sub>
 laser transitions of the Tm ion around 1.5 and 2.3 μm, respectively. Laser experiments performed at 1.5 μm in Yb:Tm:LiYF<sub>4</sub>
 then led to laser threshold values in good agreement with those derived theoretically. Based on these results, optimized values for the Yb and Tm dopant concentrations for typical values of laser cavity and pump modes were finally derived to minimize the threshold pump powers for the laser transitions around 1.5 and 2.3 μm.</div>
</front>
</TEI>
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Energy-transfer processes in Yb:Tm-doped KY3F10, LiYF4, and BaY2F8 single crystals for laser operation at 1.5 and 2.3 μm

Energy-transfer processes in Yb:Tm-doped KY3F10, LiYF4, and BaY2F8 single crystals for laser operation at 1.5 and 2.3 μm

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri