Articles producció científica> Química Física i Inorgànica

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

  • Datos identificativos

    Identificador: imarina:5610317
    Autores:
    Yong, Yean-ShengAravazhi, ShanmugamVazquez-Cordova, Sergio ACarjaval, Joan JDiaz, FrancescHerek, Jennifer LGarcia-Blanco, Sonia MPollnau, Markus
    Resumen:
    © 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.
  • Otros:

    Autor según el artículo: Yong, Yean-Sheng; Aravazhi, Shanmugam; Vazquez-Cordova, Sergio A; Carjaval, Joan J; Diaz, Francesc; Herek, Jennifer L; Garcia-Blanco, Sonia M; Pollnau, Markus
    Departamento: Química Física i Inorgànica
    Autor/es de la URV: Carvajal Martí, Joan Josep / Díaz González, Francisco Manuel
    Palabras clave: Hashtag Etiqueta «#» @uroweb @residentesaeu @infoAeu
    Resumen: © 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.
    Áreas temáticas: 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
    Direcció de correo del autor: joanjosep.carvajal@urv.cat f.diaz@urv.cat
    Identificador del autor: 0000-0002-4389-7298 0000-0003-4581-4967
    Fecha de alta del registro: 2024-10-19
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Optics Express. 24 (23): 26825-26837
    Referencia 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 del artículo: 10.1364/OE.24.026825
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2016
    Tipo de publicación: Journal Publications
  • Palabras clave:

    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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