Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7906576 | Optical Materials | 2018 | 6 Pages |
Abstract
Different concentrations of Tb3+ -doped oxyfluoro tellurite (TWGTb) glasses were prepared by conventional melt quenching technique and characterized for green laser applications. The Judd-Ofelt theory was applied to evaluate various spectroscopic and radiative parameters. The TWGTb glasses exhibit 5D3 â 7F5-3 and 5D4 â 7F6-0 transitions when excited at 316â¯nm radiation. The variation of intensity of 5D4 â 7F5 (Green) and 5D3 â 7F4 (Blue) transitions and the green to blue (IG/IB) intensity ratios were studied as a function of Tb3+ ions concentration. The laser characteristic parameters such as effective bandwidth (Îλeff), stimulated emission cross-section (Ïe), gain bandwidth (Ïeâ¯Ãâ¯Îλeff) and optical gain (Ïeâ¯Ãâ¯ÏR) were determined using the three phenomenological Judd-Ofelt intensity parameters. The fluorescence decay profiles of 5D4 metastable level exhibit single-exponential nature for all the samples. Based on the experimental results we suggest that the 1.0â¯mol% of Tb3+ -doped TWGTb glass could be a suitable laser host material to emit intense green luminescence at 545â¯nm.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
T. Subrahmanyam, K. Rama Gopal, R. Padma Suvarna, B.C. Jamalaiah, M.V. Vijaya Kumar,