Optical properties of Er3+/Yb3+-codoped transparent PLZT ceramic

✍ Scribed by Zhiqiang Zheng; Xiaoyan Li; Jing Liu; Zhuohong Feng; Baozeng Li; Jiwen Yang; Kewen Li; Hua Jiang; Xuesheng Chen; Jianping Xie; Hai Ming

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 191 KB
• Volume: 403
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2007.08.005

✦ Synopsis

Optical absorption and emission spectra of Er 3+ /Yb 3+ ions in PLZT (Pb 1Àx La x Zr y Ti 1Ày O 3 ) ceramic have been studied. Based on the Judd-Ofelt (J-O) theory, the J-O intensity parameters were calculated to be O 2 ¼ 2.021 Â 10 À20 cm 2 , O 4 ¼ 0.423 Â 10 À20 cm 2 , O 6 ¼ 0.051 Â 10 À20 cm 2 from the absorption spectrum of Er 3+ /Yb 3+ -codoped PLZT. The J-O intensity parameters have been used to calculate the radiative lifetimes and the branching ratios for some excited 4 I 13/2 , 4 I 11/2 , 4 I 9/2 4 F 9/2 , and 4 S 3/2 levels of Er 3+ ion. The stimulated emission cross-section (8.24 Â 10 À21 cm 2 ) was evaluated for the 4 I 13/2 -4 I 15/2 transition of Er 3+ . The upconversion emissions at 538, 564, and 666 nm have been observed in Er 3+ /Yb 3+ -codoped PLZT by exciting at 980 nm, and their origins were identified and analyzed.