Articles producció científica> Química Física i Inorgànica

Temperature-dependent absorption and emission of potassium double tungstates with high ytterbium content

  • Dades identificatives

    Identificador: imarina:5610317
    Autors:
    Yong, Yean-ShengAravazhi, ShanmugamVazquez-Cordova, Sergio ACarjaval, Joan JDiaz, FrancescHerek, Jennifer LGarcia-Blanco, Sonia MPollnau, Markus
    Resum:
    © 2016 Optical Society of America. We study the spectroscopic properties of thin films of potassium ytterbium gadolinium double tungstates, KYb0.57Gd0.43 (WO4)2, and potassium ytterbium lutetium double tungstates, KYb0.76Lu0.24 (WO4)2, specifically at the central absorption line near 981 nm wavelength, which is important for amplifiers and lasers. The absorption cross-section of both thin films is found to be similar to those of bulk potassium rare-earth double tungstates, suggesting that the crystalline layers retain their spectroscopic properties albeit having >50 at.% Yb3+ concentration. The influence of sample temperature is investigated and found to substantially affect the measured absorption cross-section. Since amplifiers and lasers typically operate above room temperature due to pump-induced heating, the temperature dependence of the peak-absorption cross-section of the KYb0.57Gd0.43 (WO4)2 is evaluated for the sample being heated from 20 °C to 170 °C, resulting in a measured reduction of peakabsorption cross-section at the transitions near 933 nm and 981 nm by ∼40% and ∼52%, respectively. It is shown that two effects, the change of Stark-level population and linewidth broadening due to intra-manifold relaxation induced by temperature-dependent electronphonon interaction, contribute to the observed behavior. The effective emission cross-sections versus temperature have been calculated. Luminescence-decay measurements show no significant dependence of the luminescence lifetime on temperature.
  • Altres:

    Autor segons l'article: Yong, Yean-Sheng; Aravazhi, Shanmugam; Vazquez-Cordova, Sergio A; Carjaval, Joan J; Diaz, Francesc; Herek, Jennifer L; Garcia-Blanco, Sonia M; Pollnau, Markus
    Departament: Química Física i Inorgànica
    Autor/s de la URV: Carvajal Martí, Joan Josep / Díaz González, Francisco Manuel
    Paraules clau: Hashtag Etiqueta «#» @uroweb @residentesaeu @infoAeu
    Resum: © 2016 Optical Society of America. We study the spectroscopic properties of thin films of potassium ytterbium gadolinium double tungstates, KYb0.57Gd0.43 (WO4)2, and potassium ytterbium lutetium double tungstates, KYb0.76Lu0.24 (WO4)2, specifically at the central absorption line near 981 nm wavelength, which is important for amplifiers and lasers. The absorption cross-section of both thin films is found to be similar to those of bulk potassium rare-earth double tungstates, suggesting that the crystalline layers retain their spectroscopic properties albeit having >50 at.% Yb3+ concentration. The influence of sample temperature is investigated and found to substantially affect the measured absorption cross-section. Since amplifiers and lasers typically operate above room temperature due to pump-induced heating, the temperature dependence of the peak-absorption cross-section of the KYb0.57Gd0.43 (WO4)2 is evaluated for the sample being heated from 20 °C to 170 °C, resulting in a measured reduction of peakabsorption cross-section at the transitions near 933 nm and 981 nm by ∼40% and ∼52%, respectively. It is shown that two effects, the change of Stark-level population and linewidth broadening due to intra-manifold relaxation induced by temperature-dependent electronphonon interaction, contribute to the observed behavior. The effective emission cross-sections versus temperature have been calculated. Luminescence-decay measurements show no significant dependence of the luminescence lifetime on temperature.
    Àrees temàtiques: Química Optics Odontología Medicina iii Medicina ii Materiais Matemática / probabilidade e estatística Interdisciplinar Engenharias iv Engenharias iii Engenharias ii Ciências biológicas i Ciências agrárias i Ciência da computação Biotecnología Atomic and molecular physics, and optics Astronomia / física
    ISSN: 10944087
    Adreça de correu electrònic de l'autor: joanjosep.carvajal@urv.cat f.diaz@urv.cat
    Identificador de l'autor: 0000-0002-4389-7298 0000-0003-4581-4967
    Data d'alta del registre: 2024-10-19
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Optics Express. 24 (23): 26825-26837
    Referència de l'ítem segons les normes APA: Yong, Yean-Sheng; Aravazhi, Shanmugam; Vazquez-Cordova, Sergio A; Carjaval, Joan J; Diaz, Francesc; Herek, Jennifer L; Garcia-Blanco, Sonia M; Pollnau (2016). Temperature-dependent absorption and emission of potassium double tungstates with high ytterbium content. Optics Express, 24(23), 26825-26837. DOI: 10.1364/OE.24.026825
    DOI de l'article: 10.1364/OE.24.026825
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2016
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Atomic and Molecular Physics, and Optics,Optics
    Química
    Optics
    Odontología
    Medicina iii
    Medicina ii
    Materiais
    Matemática / probabilidade e estatística
    Interdisciplinar
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Ciências biológicas i
    Ciências agrárias i
    Ciência da computação
    Biotecnología
    Atomic and molecular physics, and optics
    Astronomia / física
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