Optical transitions and upconversion luminescence of Er3+-doped tellurite glass

✍ Scribed by Xiang Shen; Qiuhua Nie; Tiefeng Xu; Shixun Dai; Xunsi Wang

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 200 KB
• Volume: 381
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.01.011

✦ Synopsis

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 from time-resolved fluorescence decay. The mutiphonon relaxation of 4 I 11/2 -4 I 13/2 transition in TWB glass was predicted and compared with other glass hosts. Efficient green and weak red upconversion luminescence from Er 3+ centers in the glass sample was observed at room temperature, and the upconversion excitation processes have been analyzed.