含Nb_2O_5碲酸盐玻璃的热力学稳定性和光谱性质

Thermal Stability and Spectroscopic Property of the Er^(3+)-Doped Tellurite Glass Containing Nb_2O_5

在掺铒碲酸盐玻璃中加入Nb2 O5以提高其热力学稳定性 ,测试了 4种掺铒碲酸盐玻璃的热力学稳定性参数及其吸收光谱、荧光光谱 .应用Judd Ofelt理论计算了玻璃的强度参数Ωt(Ω2 =(5 99～ 10 38) × 10 - 2 0 cm2 ,Ω4 =(1 91～ 2 6 7) × 10 - 2 0 cm2 ,Ω6 =(0 92～ 1 2 8)× 10 - 2 0 cm2 ) ,应用McCumber理论计算了受激发射截面 .比较了不同组成对碲酸盐热力学稳定性和光谱性质的影响 .实验结果表明 ,0 70TeO2 - 0 15ZnO - 0 0 5BaO -0 10Nb2 O5玻璃具有较大的受激发射截面 (10 96 × 10 - 2 1cm2 )和荧光半高宽 (6 7nm) ,热力学稳定性良好 ,是一种理想的掺Er3+宽带光纤放大器用基质玻璃 .

Nb 2O 5 was doped into the Er 3+-doped tellurite glass to improve its th ermal stability. The absorption spectra, fluorescence spectra and thermal stabil ity parameters of the four types of Er 3+-doped tellurite glass were inves tigated. The Judd-Ofelt intension parameters Ω t(Ω 2 = (5 99～10 38) ×10 -20 cm2, Ω 4 = (1 91～2 67)×10 -20 cm2 and Ω 6 = (0 92～1 28)×1 0 -20 cm2) were then calculated by means of Judd-Ofelt theory. Moreover, the stimulated emission cross section was calculated by McCumber theory, and th e effects of different compositions on the spectroscopic property and thermal st ability of the glass were compared. The results show that the Er 3+-doped 0 70TeO 2-0 15ZnO-0 05BaO-0 10Nb 2O 5 glass is of excellent thermal stabi lity, exhibits a large stimulated emission cross section (10 96×10 -21 cm2) and a broad full width at the half maximum (67 nm), and is a suitabl e type medium glass for the broadband Er 3+-doped fiber amplifier.