Er3+单掺及Er3+/Yb3+共掺SiO2-Al2O3-La2O3玻璃光谱性质研究

研究了单掺Er³⁺及Er³⁺/Yb³⁺共掺SiO₂-Al₂O₃-La₂O₃玻璃的光谱性质随稀土离子浓度变化规律,应用McCumber理论计算了玻璃在1.53 μm的发射截面及积分吸收截面.结果表明:在Er³⁺离子掺杂浓度相同时,玻璃在980 nm吸收截面与Yb³⁺掺杂浓度成反比;当样品中Yb³⁺离子掺杂浓度为3.94×10²⁰ cm^-3时,玻璃在1.53 μm的吸收截面和发射截面最大,在1.40～1.60 μm积分吸收截面也最大;Er³⁺/Yb³⁺共掺SiO₂-Al₂O₃-La₂O₃玻璃在1.53 μm的荧光半高宽随Er³⁺掺杂浓度升高而增加,当Er³⁺离子掺杂浓度为2.41×10²⁰ cm^-3时,玻璃的荧光半高宽(FWHM)达到52.5 nm.

The Spectroscopic Properties of Er3+ Single Doped and Er3+/Yb3+ Co-doped SiO2-Al2O3-La2O3 Glasses

The spectroscopic properties of Er³⁺single doped and Er³⁺/Yb³⁺ co-doped SiO₂-Al₂O₃-La₂O₃ glasses have been studied.The effect of Er³⁺,Yb³⁺ ion concentrations on the spectroscopic properties were researched.The stimulated emission cross section of Er³⁺ was calculated by McCumber theory.It is found that the absorption cross section at 980 nm decreases with the increase of the Yb³⁺ ion concentration at fixed Er³⁺ ion concentration of 3.93?10¹⁹ cm^-3.In this Er³⁺ ion concentration,the absorption cross section and stimulated emission cross section at 1530 nm reaches the largest values of 0.58?10²⁰ cm² and 0.64?10^-20 cm² and 0.64?10^-20 cm² at the Yb³⁺ ion concentrations of 3.94?10²⁰ cm^-3.It is noticed that FWHM of 1530 nm peak becomes wider with the increase of Er³⁺ ion concentration in the Er³⁺/Yb³⁺ co-doped SiO₂-Al₂O₃-La₂O₃ glass,the widest FWHM is 52.5 nm at Er³⁺ ion concentration of 2.41?10²⁰ cm^-3.