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http://cio.repositorioinstitucional.mx/jspui/handle/1002/547| Comparative Study of The Spectroscopic Properties Of Yb3þ/Er3þ codoped Tellurite Glasses Modified With R2o (R=Li, Na And K) | |
| Haggeo Desirena ELDER DE LA ROSA CRUZ LUIS ARMANDO DIAZ TORRES | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Spectroscopic characterization of Yb3þ/Er3þ codoped TeO2–R2O–ZnO–Ln2O3 glasses as a function of network modifiers (R¼Li, Na and K) has been investigated. The Judd–Ofelt parameters (Ot), quantum efficiency in near infrared (1.55 mm) and visible up-conversion (546 and 660 nm) and quality factor spectroscopy (w) were calculated. Three up-conversion emission bands centered at 525, 546 and 660 nm were observed as maxima for glasses containing potassium. The measured lifetime of 4I13/2, 4F9/2 and 4S3/2 from Er3þ and 4F5/2 from Yb3þ levels increased when potassium (K) replaced lithium (Li) and Na. The maximum emission cross-section (ECS) for 4I13/2-4I15/2 transition of Er3þ was calculated to be 1.021020 cm2 for TeO2–Li2O–ZnO–Ln2O3 glasses. The energy transfer efficiency (ET) from Yb3þ to Er3þ, (4F5/2)þ(4I15/2)-(4F7/2)þ(4I13/2), was calculated using the measured lifetimes of Yb3þ with and without the presence of acceptor (Er3þ). The maximum calculated ET was 58% for 0.25 mol% of Er3þ and 3mol% of Yb3þ for TeO2–K2O–ZnO–Ln2O3 glass composition. | |
| 24-08-2011 | |
| Artículo | |
| CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA | |
| Aparece en las colecciones: | Articulos Arbitrados 2012 |
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| Comparative study of the spectroscopic properties, De la Rosa.pdf | 374.51 kB | Adobe PDF | Visualizar/Abrir |