Balaji, Sathravada and Sontakke, Atul D and Annapurna, K (2012) Yb3+ ion concentration effects on similar to 1 mu m emission in tellurite glass. Journal of the Optical Society of America B-Optical Physics , 29 (7). pp. 1569-1579. ISSN 0740-3224

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The effects of Yb3+ ion concentration on physical, optical, and spectroscopic properties have been studied in a low phonon (similar to 590 cm(-1)) barium-lanthanum-tellurite glass. Due to the unfeasibility of Judd-Ofelt theory Yb3+-doped systems, the oscillator strength of absorption transition, F-2(7/2) -> F-2(5/2) has been evaluated by using the Smakula equation. The nature of emission from F-2(5/2) -> F-2(7/2) transition of Yb3+ ions is described theoretically by using a rate equation in comparison with experimental results. By applying reciprocity (RM) and Fuchtbauer-Ladenburg methods on emission spectra as well as the excitation random walk model on measured fluorescence lifetimes, the radiation trapping and concentration quenching effects have been discussed. Considering all the spectroscopic and laser performance parameters, an optimum Yb-ion doping concentration (YT1) has been determined, and the gain measurements performed on the sample revealed a flat gain over a broad wavelength range could be achieved even with a low (similar to 20%) excitation population density. A comparative study with other hosts revealed the potentiality of the present glass for similar to 1 micron emission. (C) 2012 Optical Society of America

Item Type: Article
Subjects: Glass
Divisions: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 18 Sep 2012 07:21
Last Modified: 18 Sep 2012 07:21

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