Influence of Nd3+ concentration on its optical absorption and luminescence properties in potassium borate glass

Ratnakaram, YC and Altaf, Abdul Md and Chakradhar, Sreekanth RP and Rao, JL and Ramakrishna, J (2003) Influence of Nd3+ concentration on its optical absorption and luminescence properties in potassium borate glass. In: Physica Status Solidi (b), 236 (1). pp. 200-208.

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Abstract

Spectroscopic and laser properties of Nd3þ doped potassium borate glass have been studied for different Nd3þ concentrations ranging from 0.5 to 2.0 mol%. From the absorption spectra, optical band gaps (Eopt) and various spectroscopic parameters (E1, E2, E3, \xi4f and \alpha) are determined. Using Judd-Ofelt intensity parameters \Omega2, \Omega4 and \Omega6, radiative lifetimes (\tau R), branching ratios (\beta) and integrated absorption cross sections (\Sigma) have been calculated for certain excited states of Nd3+ for all the Nd3+ concentrations. From the spectral profiles of the hypersensitive transition, it is observed that there is slight change in the environment of Nd3+ ion in different concentrations of Nd3+ doped potassium borate glass. The radiative lifetimes (\tau R) for certain excited levels are minimum when the concentration is high. From the emission spectra, peak wavelengths (\lambda p), effective line widths (\Delta\lambda eff) and stimulated emission cross-sections (\sigma p) have been obtained for the three transitions 4F3/2 \rightarrow 4I9/2, 4F3/2 \rightarrow 4I11/2 and 4F3/2 \rightarrow 4I13/2 of Nd3+ and are compared for different concentrations.

Item Type:	Journal Article
Publication:	Physica Status Solidi (b)
Publisher:	WILEY-VCH Verlag GmbH & Co.
Additional Information:	Copyright for this article belongs to WILEY-VCH Verlag GmbH & Co.
Keywords:	optical absorption;luminescence;Nd3+;Glasses
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	18 Dec 2004
Last Modified:	19 Sep 2010 04:17
URI:	http://eprints.iisc.ac.in/id/eprint/2469

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