摘要
制备了Er3+及Er3+/Yb3+共掺铋酸盐玻璃,测试了样品的吸收光谱、荧光光谱.应用Judd-Oflet理论计算了Er3+在铋酸盐玻璃中的光谱强度参数,分别为Ω2=(5.47—2.92)×10-20cm2,Ω4=(2.16—1.22)×10-20cm2,Ω6=(1.29—0.80)×10-20cm2.比较了Er3+及Er3+/Yb3+共掺铋酸盐玻璃在980nm附近的吸收截面和1.5μm的荧光发射光谱强度,Er3+/Yb3+共掺铋酸盐玻璃的荧光光谱半高宽达到91nm,比Er3+单掺铋酸盐玻璃大15nm.用McCumber理论计算了Er3+在1.5μm的受激发射截面σe=1.00×10-20cm2.比较了Er3+在不同基质中的光谱特性,结果表明铋酸盐玻璃更适合作为掺铒光纤放大器的基质材料.
The Er^3＋ and Er^3＋/Yb^3＋ co-doped bismuth glasses were prepared in this work. The absorption spectra and fluorescence spectra of the glasses were measured at room temperature. The strength parameters calculated according to the Judd-Ofelt theory from the absorption spectra are Ω2 = （5.47-2.92） x 10^-20cm^2 ,Ω4 = （2.16-1.22） x 10^-20cm^2, and Ω6 = （1.29-0.80） x 10^-20cm^2 . The absorption cross section at 980 nm and intensty of emission spectra at 1.5 μm were compared. FWHM of the broad fluorescence band of Er^3＋/Yb^3＋ co-doped bismuth glass at 1.5 μm is 91 nm, which is 15 nm larger than that of Er^3＋ - doped bismuth glass. Emission cross section of σe = 1.00 x 10^-20 cm^2 has been obtained using McCumber theory. The optical properties of Er^3＋ ion in bismuth-based glass are discussed by comparing with other glasses. The results show that Er^3＋ doping of bismuth based glass is highly preferable for optical amplifier to realize broadband high gain amplification.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第8期4971-4976,共6页
Acta Physica Sinica
基金
哈尔滨师范大学骨干教师计划(批准号:2001J01)资助的课题.
