Optical absorption and fluorescence properties of $Er^{3+}$ in sodium borate glass

Ratnakaram, YC and Lakshmi, J and Chakradhar, RPS (2005) Optical absorption and fluorescence properties of $Er^{3+}$ in sodium borate glass. In: Bulletin of Materials Science, 28 (5). pp. 461-465.

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Abstract

Spectroscopic properties of $Er^{3+}$ ions in sodium borate glass have been studied. The indirect and direct optical band gaps $(E_{opt})$ and energy level parameters (Racah $(E^{1}, E^{2} and E^{3})$, spin-orbit $(\xi_{4f})$ and configurational interaction (\alpha)) are evaluated. Spectral intensities for various absorption bands of $Er^{3+}$ doped sodium borate glass are calculated. Using Judd-Ofelt intensity parameters $(\Omega_{2},\Omega_{4}, \Omega_{6})$, radiative transition probabilities (A), branching ratios (\beta) and integrated absorption cross sections (\Sigma) are reported for certain transitions. The radiative life times $(\tau_{R})$ for different excited states are estimated. From the fluorescence spectra,the emission cross section $(\sigma_{p})$ for the transition, $^{4}I_{13/2} -> ^{4}I_{15/2}$ is reported.

Item Type:	Journal Article
Publication:	Bulletin of Materials Science
Publisher:	Indian Academy of Sciences
Additional Information:	Copyright for this article belongs to Indian Academy of Sciences.
Keywords:	Optical band gap;intensity parameter;transition probability
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	21 Sep 2005
Last Modified:	19 Sep 2010 04:20
URI:	http://eprints.iisc.ac.in/id/eprint/3697

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