Er^(3+)单掺与Er^(3+)/Pr^(3+)共掺碲酸盐玻璃的2.7μm光谱性质及能量转移过程  

2.7μm Fluorescence and Energy Transfer Process in Er^(3+)-Doped and Er^(3+)/Pr^(3+)Co-Doped Tellurite Glasses

作　　者：范小康[1,2] 王欣[1,2] 李夏[1,2] 李科峰[1] 胡丽丽[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800 [2]中国科学院大学,北京100049

出　　处：《光学学报》2014年第1期163-169,共7页Acta Optica Sinica

基　　金：国家自然科学基金(60937003;61308084);上海市自然科学基金(12ZR1451600)

摘　　要：采用高温熔融法制备了不同浓度Er3+,Er3+/Pr3+共掺的60TeO2-30WO3-10La2O3玻璃。研究了玻璃的红外透过光谱,吸收光谱以及在980nm LD抽运下的荧光光谱和Er3+…4I13/2能级荧光寿命。根据红外光谱计算了玻璃中OH-的吸收系数α。应用Judd-Ofelt理论计算了J-O参量,自发辐射系数Arad,荧光分支比β;利用Fuchtbauer-Laderburg理论计算了2.7μm受激发射截面。分析了980nm抽运时Er3+/Pr3+共掺的能量转移过程。计算得到OH-吸收系数α为0.57cm-1,2.7μm自发辐射系数Arad为60.6s-1,荧光分支比β为16.3%,最大受激发射截面达到1.13×10-20 cm2。结果表明,这种碲酸盐玻璃适合作为获得2.7μm输出的激光材料。Abstract Er3＋ singly doped and Er3＋/Pr3＋ co-doped tellurite glasses 60TeO2-30WO2-10La2O3 are prepared by conventional melting method. The fluorescence spectra and lifetime of Er3＋ ：4 I13/2 level pumped by 980 nm laser diode （LD） are investigated. The infrared and absorption spectra are measured. The absorption coefficient a is calculated based on the infrared spectrum. The spontaneous radiative coefficient Arad and fluorescence ratio fl are acquired by Judd-Ofelt theory. Fuchtbauer-Laderburg theory is applied to calculate the stimulated emission cross section around 2.7 μm. The energy transfer processes and spectroscopic properties of Er3＋-doping and Er3＋/Pr3＋ co-doping are analyzed under 980 nm LD excitation. The calculated absorption coefficient a of OH is 0.57 cm-1 , the spontaneous radiative coefficient Arad, fluorescence ratio β and the maximum stimulated emission cross section of Er3＋/Pr3＋ to transition are 60.6 s-1 , 16.3%, and 1.13 × 10 20 cm2 , respectively. The results indicate that this kind of tellurite glass is a promising matrix for 2.7 μm laser.

关 键 词：材料 碲酸盐 ER3+ Pr3+ 2 7μm荧光 能量转移 

分 类 号：O436[机械工程—光学工程]