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Sol-gel Eu3+/Tm3+ doped transparent glass-ceramic waveguides

Identifieur interne : 001B10 ( Main/Exploration ); précédent : 001B09; suivant : 001B11

Sol-gel Eu3+/Tm3+ doped transparent glass-ceramic waveguides

Auteurs : S. J. L. Ribeiro [Brésil] ; C. C. Araujo [Brésil] ; L. A. Bueno [Brésil] ; R. R. Goncalves [Brésil] ; Y. Messaddeq [Brésil]

Source :

Journal of non-crystalline solids [ 0022-3093 ] ; 2004.

RBID : Pascal:05-0010636

Descripteurs français

Pascal (Inist)
- Procédé sol gel, Dopage, Traitement thermique, Largeur bande, Dépôt immersion, Constante optique, Indice réfraction, Epaisseur, Impureté, Addition europium, Addition thulium, Application, Amplification optique, Couche mince, Vitrocéramique, Matériau transparent, Verre fluorure, Oxyfluorure, La, O Si, SiO2, F, 7866J.
Wicri :
- topic : Dopage.

English descriptors

KwdEn :
- Application, Bandwidth, Dip coating, Doping, Europium additions, Fluoride glass, Glass ceramics, Heat treatments, Impurities, Optical amplification, Optical constants, Oxyfluorides, Refractive index, Sol-gel process, Thickness, Thin films, Thulium additions, Transparent material.

Abstract

Eu³⁺ and Tm³⁺ doped lanthanum fluoride and lanthanum oxyfluoride are obtained from Eu³⁺, Tm³⁺ containing lanthanum fluoracetate solutions. The nature of the crystal phase obtained could be controlled by the temperature of heat treatment. Spectral characteristics of Eu³⁺ doped crystal phases were sufficiently different to allow utilization of Eu³⁺ as structural probes. Tm³⁺ emission at the technologically important spectral region of 1450nm could be observed for the fluoride and oxyfluoride crystal phases. The large bandwidth obtained (around 120nm) suggests potential applications in optical amplification. SiO₂-LaF₃-LaOF composite materials were also prepared. It is observed that for heat treatments above 800°C, fluorine loss, probably in the form of SiF₄ hinder the observation of Tm³⁺ emission. Eu³⁺ spectroscopic characteristics clearly show the evolution of a fluoride like environment to an amorphous oxide one as the temperature of heat treatment increased. Thin films obtained by dip-coating on v-SiO₂ substrates and treated at 300°C, 500°C and 800°C display guided modes in the visible and infrared regions. Optical characteristics (refractive index and films thickness) were obtained at 543.5, 632.8 and 1550 nm. Attenuation as low as 1.8 dB/cm was measured at 632.8 nm.

Affiliations:

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Le document en format XML

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/Tm<sup>3+</sup>
 doped transparent glass-ceramic waveguides</title>
<author><name sortKey="Ribeiro, S J L" sort="Ribeiro, S J L" uniqKey="Ribeiro S" first="S. J. L." last="Ribeiro">S. J. L. Ribeiro</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Sol-gel Eu<sup>3+</sup>
/Tm<sup>3+</sup>
 doped transparent glass-ceramic waveguides</title>
<author><name sortKey="Ribeiro, S J L" sort="Ribeiro, S J L" uniqKey="Ribeiro S" first="S. J. L." last="Ribeiro">S. J. L. Ribeiro</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Institute of Chemistry, UNESP</s1>
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<author><name sortKey="Araujo, C C" sort="Araujo, C C" uniqKey="Araujo C" first="C. C." last="Araujo">C. C. Araujo</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Institute of Chemistry, UNESP</s1>
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<author><name sortKey="Bueno, L A" sort="Bueno, L A" uniqKey="Bueno L" first="L. A." last="Bueno">L. A. Bueno</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Institute of Chemistry, UNESP</s1>
<s2>Araraquara, SP 14801-970</s2>
<s3>BRA</s3>
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<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>Brésil</country>
<placeName><region type="state">État de São Paulo</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Goncalves, R R" sort="Goncalves, R R" uniqKey="Goncalves R" first="R. R." last="Goncalves">R. R. Goncalves</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Institute of Chemistry, UNESP</s1>
<s2>Araraquara, SP 14801-970</s2>
<s3>BRA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>Brésil</country>
<placeName><region type="state">État de São Paulo</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Messaddeq, Y" sort="Messaddeq, Y" uniqKey="Messaddeq Y" first="Y." last="Messaddeq">Y. Messaddeq</name>
<affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Institute of Chemistry, UNESP</s1>
<s2>Araraquara, SP 14801-970</s2>
<s3>BRA</s3>
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<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>Brésil</country>
<placeName><region type="state">État de São Paulo</region>
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</author>
</analytic>
<series><title level="j" type="main">Journal of non-crystalline solids</title>
<title level="j" type="abbreviated">J. non-cryst. solids</title>
<idno type="ISSN">0022-3093</idno>
<imprint><date when="2004">2004</date>
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<seriesStmt><title level="j" type="main">Journal of non-crystalline solids</title>
<title level="j" type="abbreviated">J. non-cryst. solids</title>
<idno type="ISSN">0022-3093</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Application</term>
<term>Bandwidth</term>
<term>Dip coating</term>
<term>Doping</term>
<term>Europium additions</term>
<term>Fluoride glass</term>
<term>Glass ceramics</term>
<term>Heat treatments</term>
<term>Impurities</term>
<term>Optical amplification</term>
<term>Optical constants</term>
<term>Oxyfluorides</term>
<term>Refractive index</term>
<term>Sol-gel process</term>
<term>Thickness</term>
<term>Thin films</term>
<term>Thulium additions</term>
<term>Transparent material</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Procédé sol gel</term>
<term>Dopage</term>
<term>Traitement thermique</term>
<term>Largeur bande</term>
<term>Dépôt immersion</term>
<term>Constante optique</term>
<term>Indice réfraction</term>
<term>Epaisseur</term>
<term>Impureté</term>
<term>Addition europium</term>
<term>Addition thulium</term>
<term>Application</term>
<term>Amplification optique</term>
<term>Couche mince</term>
<term>Vitrocéramique</term>
<term>Matériau transparent</term>
<term>Verre fluorure</term>
<term>Oxyfluorure</term>
<term>La</term>
<term>O Si</term>
<term>SiO2</term>
<term>F</term>
<term>7866J</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Dopage</term>
</keywords>
</textClass>
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</teiHeader>
<front><div type="abstract" xml:lang="en">Eu<sup>3+</sup>
 and Tm<sup>3+</sup>
 doped lanthanum fluoride and lanthanum oxyfluoride are obtained from Eu<sup>3+</sup>
, Tm<sup>3+</sup>
 containing lanthanum fluoracetate solutions. The nature of the crystal phase obtained could be controlled by the temperature of heat treatment. Spectral characteristics of Eu<sup>3+</sup>
 doped crystal phases were sufficiently different to allow utilization of Eu<sup>3+</sup>
 as structural probes. Tm<sup>3+</sup>
 emission at the technologically important spectral region of 1450nm could be observed for the fluoride and oxyfluoride crystal phases. The large bandwidth obtained (around 120nm) suggests potential applications in optical amplification. SiO<sub>2</sub>
-LaF<sub>3</sub>
-LaOF composite materials were also prepared. It is observed that for heat treatments above 800°C, fluorine loss, probably in the form of SiF<sub>4</sub>
 hinder the observation of Tm<sup>3+</sup>
 emission. Eu<sup>3+</sup>
 spectroscopic characteristics clearly show the evolution of a fluoride like environment to an amorphous oxide one as the temperature of heat treatment increased. Thin films obtained by dip-coating on v-SiO<sub>2</sub>
 substrates and treated at 300°C, 500°C and 800°C display guided modes in the visible and infrared regions. Optical characteristics (refractive index and films thickness) were obtained at 543.5, 632.8 and 1550 nm. Attenuation as low as 1.8 dB/cm was measured at 632.8 nm.</div>
</front>
</TEI>
<affiliations><list><country><li>Brésil</li>
</country>
<region><li>État de São Paulo</li>
</region>
</list>
<tree><country name="Brésil"><region name="État de São Paulo"><name sortKey="Ribeiro, S J L" sort="Ribeiro, S J L" uniqKey="Ribeiro S" first="S. J. L." last="Ribeiro">S. J. L. Ribeiro</name>
</region>
<name sortKey="Araujo, C C" sort="Araujo, C C" uniqKey="Araujo C" first="C. C." last="Araujo">C. C. Araujo</name>
<name sortKey="Bueno, L A" sort="Bueno, L A" uniqKey="Bueno L" first="L. A." last="Bueno">L. A. Bueno</name>
<name sortKey="Goncalves, R R" sort="Goncalves, R R" uniqKey="Goncalves R" first="R. R." last="Goncalves">R. R. Goncalves</name>
<name sortKey="Messaddeq, Y" sort="Messaddeq, Y" uniqKey="Messaddeq Y" first="Y." last="Messaddeq">Y. Messaddeq</name>
</country>
</tree>
</affiliations>
</record>

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Sol-gel Eu3+/Tm3+ doped transparent glass-ceramic waveguides

Sol-gel Eu3+/Tm3+ doped transparent glass-ceramic waveguides

Source :

Descripteurs français

English descriptors

Abstract

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

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Pour mettre un lien sur cette page dans le réseau Wicri