Er3+及Er3+/Yb3+共掺铋酸盐玻璃光谱性质研究

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, 关键词： 3+')" href="#">Er³⁺ 铋酸盐玻璃 3+/Yb³⁺共掺')" href="#">Er³⁺/Yb³⁺共掺 光谱性质

Spectroscopic properties of Er3+and Er3+/Yb3+ co-doped bismuth glasses

The Er³⁺ and Er³⁺/Yb³⁺ 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)×10^-20 cm²，Ω₄=(2.16—1.22)×10^-20 cm^{2, and Ω₆=(1.29—0.80)×10-20 cm2. 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 Er3+/Yb3+ co-doped bismuth glass at 1.5 μm is 91 nm, which is 15 nm larger than that of Er3+-doped bismuth glass. Emission cross section of σ_e=1.00×10-20 cm2 has been obtained using McCumber theory. The optical properties of Er3+ ion in bismuth-based glass are discussed by comparing with other glasses. The results show that Er3+ dopingof bismuth based glass is highly preferable for optical amplifier to realize broadband high gain amplification.}