Spectral Properties and Upconversion Luminescence of Er3+, Yb3+: BaWO4 Crystal
来源期刊：JOURNAL OF RARE EARTHS2007年第5期
论文作者：Feng Baohua Zou Yulin Zang Jingcun Guo Kai Lü Chao Xie Liyan Liu Guoqing Li Xiao
Key words：laser crystal; upconversion; Er3+,Yb3+: BaWO4 crystal; rare earths;
Abstract: The optical quality of Er3+, Yb3+: BaWO4 crystal was grown by Czochralski method. Absorption spectra were measured and energy levels were assigned. According to Judd-Ofelt theory, the spectral strength parameters of Er3+ ion were fitted to be Ω2=0.3926×10-20 cm2, Ω4=0.0721×10-20 cm2, Ω6=0.0028×10-20 cm2. Emission peaks centered at around 523, 544 and 670 nm were observed under 334 nm He-Cd laser excitation and emission peaks centered at 1001 and 1534 nm were detected under 976 nm laser excitation. Strong green emission was also observed when the crystal was pumped with 808 nm and 976 nm laser. The mechanisms of frequency upconversion and sensitization were analyzed.
Feng Baohua1，Zou Yulin2，Zang Jingcun2，Guo Kai3，Lü Chao2，Xie Liyan2，Liu Guoqing3，Li Xiao2
(1.Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
2.College of Materials Science and Engineering, University of Technology Beijing, Beijing 100022, China;
3.College of Applied Science, University of Technology Beijing, Beijing 100022, China)
Abstract:The optical quality of Er3+, Yb3+: BaWO4 crystal was grown by Czochralski method. Absorption spectra were measured and energy levels were assigned. According to Judd-Ofelt theory, the spectral strength parameters of Er3+ ion were fitted to be Ω2=0.3926×10-20 cm2, Ω4=0.0721×10-20 cm2, Ω6=0.0028×10-20 cm2. Emission peaks centered at around 523, 544 and 670 nm were observed under 334 nm He-Cd laser excitation and emission peaks centered at 1001 and 1534 nm were detected under 976 nm laser excitation. Strong green emission was also observed when the crystal was pumped with 808 nm and 976 nm laser. The mechanisms of frequency upconversion and sensitization were analyzed.
Key words:laser crystal; upconversion; Er3+,Yb3+: BaWO4 crystal; rare earths;
【全文内容正在添加中】
