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