Effect of Tb3+ co-doping on the electron population densities of Tm3+ in Ge-As-Ga-S glasses
Identifieur interne : 002306 ( Main/Merge ); précédent : 002305; suivant : 002307Effect of Tb3+ co-doping on the electron population densities of Tm3+ in Ge-As-Ga-S glasses
Auteurs : Yong Beom Shin [Corée du Sud] ; Ji Hyun Kim [Corée du Sud] ; You Song Kim [Corée du Sud] ; Jong Heo [Corée du Sud]Source :
- Journal of applied physics [ 0021-8979 ] ; 2000-09-01.
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- Pascal (Inist)
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Abstract
The 1.48-μm emission properties and electron population densities of the excited levels were investigated for Ge-As-Ga-S glasses doped with Tm3+ or Tm3+/Tb3+. Electron population inversion between the 3H4 and 3F4 levels in Tm3+ cannot be achieved without Tb3+ addition due to the strong cross-relaxation in Tm3+. Co-doping of Tb3+ resulted in the large decrease in the population density of the Tm3+:3F4 level via the energy transfer of Tm3+:3F4→Tb3+:7F0,1,2. Calculated population densities of the two levels in Tm3+ using the rate equations showed that the population inversion became possible through the addition of Tb3+. © 2000 American Institute of Physics.
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Effect of Tb<sup>3+</sup>
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<series><title level="j" type="main">Journal of applied physics</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chalcogenide glasses</term>
<term>Experimental study</term>
<term>Fluorescence</term>
<term>Gallium compounds</term>
<term>Germanate glasses</term>
<term>Impurity absorption spectra</term>
<term>Impurity states</term>
<term>Population inversion</term>
<term>Terbium</term>
<term>Thulium</term>
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<term>Etude expérimentale</term>
<term>Inversion population</term>
<term>Verre germanate</term>
<term>Verre chalcogénure</term>
<term>Gallium composé</term>
<term>Terbium</term>
<term>Thulium</term>
<term>Etat impureté</term>
<term>Fluorescence</term>
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<front><div type="abstract" xml:lang="en">The 1.48-μm emission properties and electron population densities of the excited levels were investigated for Ge-As-Ga-S glasses doped with Tm<sup>3+</sup>
or Tm<sup>3+</sup>
/Tb<sup>3+</sup>
. Electron population inversion between the <sup>3</sup>
H<sub>4</sub>
and <sup>3</sup>
F<sub>4</sub>
levels in Tm<sup>3+</sup>
cannot be achieved without Tb<sup>3+</sup>
addition due to the strong cross-relaxation in Tm<sup>3+</sup>
. Co-doping of Tb<sup>3+</sup>
resulted in the large decrease in the population density of the Tm<sup>3+</sup>
:<sup>3</sup>
F<sub>4</sub>
level via the energy transfer of Tm<sup>3+</sup>
:<sup>3</sup>
F<sub>4</sub>
→Tb<sup>3+</sup>
:<sup>7</sup>
F<sub>0,1,2</sub>
. Calculated population densities of the two levels in Tm<sup>3+</sup>
using the rate equations showed that the population inversion became possible through the addition of Tb<sup>3+</sup>
. © 2000 American Institute of Physics.</div>
</front>
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<affiliations><list><country><li>Corée du Sud</li>
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<name sortKey="Heo, Jong" sort="Heo, Jong" uniqKey="Heo J" first="Jong" last="Heo">Jong Heo</name>
<name sortKey="Kim, Ji Hyun" sort="Kim, Ji Hyun" uniqKey="Kim J" first="Ji Hyun" last="Kim">Ji Hyun Kim</name>
<name sortKey="Kim, You Song" sort="Kim, You Song" uniqKey="Kim Y" first="You Song" last="Kim">You Song Kim</name>
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