Sontakke, Atul D and Biswas, Kaushik and Mandal, Ashis Kumar and Annapurna, K (2010) Time resolved spectra and energy transfer analysis of Nd3+-Yb3+-Er3+ triply-doped Ba-Al-metaphosphate glasses for an eye safe emission (1.54 μm). Journal of Fluorescence, 20 (1). pp. 425-434. ISSN 1053-0509

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Abstract

This paper reports on the development and systematic analysis of energy transfer mechanisms in Nd3+-Yb3+-Er3+ co-doped new series of barium-alumino-metaphosphate glasses. The time resolved fluorescence spectra of Nd3+ in triply doped Ba-Almetaphosaphte glasses have revealed that, Yb3+ ions could function as quite efficient bridge for an energy transfer between Nd3+ and Er3+ ions. As a result, a fourfold emission enhancement at 1.54 μm of Er3+ ions has been achieved through an excitation of 4F5/2 level of Nd3+ at 806 nm for the glass having 3 mol% Yb3+ with an energy transfer efficiency reaching up to 94%. Decay of donor (Nd3+) ion fluorescence has been analyzed based on theoretical models such as Inokuti-Hirayama, Burshtein (migration) and Yokota-Tanimoto (diffusion) and corresponding energy transfer parameters have been discussed. Primarily, electrostatic dipole-dipole (s ~ 6) interactions are found to be responsible for the occurrence of energy transfer process in theses glasses.

Item Type:	Article
Uncontrolled Keywords:	Metaphosphate glasses, energy transfer, fluorescence, sensitized Er3+ emission.
Subjects:	Glass
Divisions:	Glass
Depositing User:	Mrs Chandana Patra
Date Deposited:	15 Nov 2011 11:51
Last Modified:	11 Jan 2013 06:30
URI:	http://cgcri.csircentral.net/id/eprint/6

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