title: Optical analysis of samarium doped sodium bismuth silicate glass.
abstract: Samarium doped sodium bismuth silicate glass was synthesized using the melt quenching method. Detailed optical spectroscopic studies of the glassy material were carried out in the UV-Vis-NIR spectral range. Using the optical absorption spectra Judd-Ofelt (JO) parameters are derived. The calculated values of the JO parameters are utilized in evaluating the various radiative parameters such as electric dipole line strengths (Sed), radiative transition probabilities (Arad), radiative lifetimes (τrad), fluorescence branching ratios (β) and the integrated absorption cross- sections (σa) for stimulated emission from various excited states of Sm3+‡ ion. The principal fluorescence transitions are identified by recording the fluorescence spectrum. Our analysis revealed that the novel glassy system has the optimum values for the key parameters viz. spectroscopic quality factor, optical gain, stimulated emission cross section and quantum efficiency, which are required for a high performance optical amplifier. Calculated chromaticity co-ordinates (0.61, 0.38) also confirm its application potential in display devices.
authors: Department of Physics, College of Science, Sultan Qaboos University, AlKhoud, Oman; Department of Physics, Christian College Chengannur, University of Kerala, India. Electronic address: vinoythoma@gmail.com.
authors: V
authors: V
authors: Thomas
authors: Department of Physics, College of Science, Sultan Qaboos University, AlKhoud, Oman.
authors: R G S
authors: RGS
authors: Sofin
authors: UDSMM, Université du Littoral Côte d'Opale, 59140 Dunkerque, France.
authors: M
authors: M
authors: Allen
authors: Department of Physics, Christian College Chengannur, University of Kerala, India.
authors: H
authors: H
authors: Thomas
authors: School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, India.
authors: P R
authors: PR
authors: Biju
authors: Institute for Materials Research, School of Process, Environmental and Materials Engineering, University of Leeds, UK.
authors: G
authors: G
authors: Jose
authors: School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, India.
authors: N V
authors: NV
authors: Unnikrishnan
keywords: A. Glasses; D. Optical properties