B_2O_3含量对掺铒碲铌酸盐玻璃光谱性质及热稳定性影响(英文)

Effect of B_2O_3 Content on the Spectroscopic Properties and Thermal Stability of Er^(3+)-doped Niobic Tellurite Glasses

制备了一系列碲铌酸盐玻璃85TeO2-(15 -x)Nb2O5-xB2O3-1%Er2O3(TNBx=0, 3, 6, 9, 12, 15)。根据Judd-Ofelt(J-O)和McCumber理论,讨论和分析了B2O3含量对掺铒碲铌酸盐玻璃热稳定性及光谱性质影响。研究发现,玻璃开始析晶温度和玻璃转变温度差值ΔT(Tx-Tg),J-O强度参数,FWHM和峰值受激发射截面的乘积在B2O3引入摩尔分数为9%时达到最大值。同时,Er3 +:4I13/2能级寿命也随着B2O3含量的增加而单调增加。结果表明,在掺铒碲铌玻璃中,适量的B2O3能较好地提高玻璃的热稳定性能和Er3 +离子的光谱性质。

A series of niobic tellurite glasses of 85TeO2- （ 15 -x） Nb2O5-xB2O3-1% Er2O3（TNB x =0,3,6,9,12, 15 ,molar fraction） glasses were prepared. The effect of B2O3 content on the spectroscopic properties and thermal stability of Er^3＋ -doped niobic tellurite glasses were investigated and discussed based on Judd-Ofelt （J-O） and McCumber theory. For the glasses with different B2 O3 content, it is found that the transition temperature （ Tg ）, crystallization onset temperature （ Tx ） △T, J-O intensity parameters Ω1, （ t = 2, 4, 6）, the product of fluorescence full width at half maximum （FWHM） and the peak of stimulated emission cross-section （σe^peak） reach the maximum values when B2O3 is 9% （molar fraction）. The measured lifetime of Er^3＋：4^I13/2 level （τm） increases monotonically with increasing B2O3. The results indicate that in Er^3＋ -doped niobic tellurite glasses, proper amount of B2O3 can be used as a modiffer to imnrove thermal stability and snectrosconic properties of Er^3 ＋ ions.