Optical and luminescence studies of Pr3+ and Er3+ doped different phosphate glasses

✍ Scribed by K. Venkata Rao; Y.C. Ratnakaram; M. Seshadri; J.L. Rao

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 661 KB
• Volume: 405
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2010.02.032

✦ Synopsis

Optical absorption and emission spectra of Pr 3 + and Er 3 + doped different chlorophosphate glasses have been studied. Optical properties of these two rare earth ions were characterized through optical absorption and emission spectra using Judd-Ofelt theory. Judd-Ofelt intensity parameters O l (l=2, 4 and 6) are calculated for both the ions from their absorption spectra, which in turn used to derive the radiative properties such as radiative transition probabilities (A T ), radiative lifetimes (t R ), branching ratios (b) and integrated absorption cross-sections (S). An attempt has been made to discuss structural changes considering the hypersensitive transitions and covalency of rare earth oxygen (RE-O) bonds for the present glass systems. From emission spectra, peak emission cross-sections (s P ) are obtained for the observed emission bands of Pr 3 + and Er 3 + ions in all these chlorophosphate glasses. Variation of peak emission cross-sections with the glass matrix has been studied.