Upconversion luminescence in Tm3+/Yb3+co-doped lead tungstate tellurite glasses
β Scribed by A. Mohan Babu; B.C. Jamalaiah; T. Chengaiah; G.V. Lokeswara Reddy; L. Rama Moorthy
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 581 KB
- Volume
- 406
- Category
- Article
- ISSN
- 0921-4526
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The upconversion luminescence properties of Yb 3+ /Tm 3+ -codoped oxyfluoride tellurite glasses under 980 nm excitation are investigated experimentally. The intense blue and relatively weak red emissions centered at 475 and 649 nm corresponding to the transitions 1 G 4 β 3 H 6 and 1 G 4 β 3 H 4 of T
Spectroscopic properties of Er 3+ -doped TeO 2 -WO 3 -Bi 2 O 3 (TWB) glass has been investigated. The transition probabilities, excited state lifetimes, and the branching ratios have been predicted for Er 3+ based on the Judd-Ofelt theory. The lifetime of 4 I 11/2 and 4 I 13/2 level were measured fr