【作者】 李善锋；

【导师】 张庆瑜；

【作者基本信息】 大连理工大学 ， 等离子体物理， 2005， 硕士

【摘要】 本文采用固相反应方法,制备了不同掺Er、Yb浓度的硅酸盐激光玻璃以及掺Er氟化物玻璃陶瓷,并对激光玻璃的吸收光谱和光致荧光光谱进行了分析。研究结果显示:对于单掺Er的硅酸盐玻璃,当掺Er浓度为0.5 at.%时,1536nm处的光致荧光最强。当掺Er浓度从0.1 at.%提高到0.8 at.%时,1536nm处的光致荧光光谱的半高宽从18nm增长到26nm。Yb³⁺掺杂对Er³⁺在980nm附近的吸收起到了非常显著的增强作用。在980nm的激光泵浦下,激光玻璃在1530nm处的光致发光强度随着Yb离子浓度的增加而先增大后减小,当Yb³⁺离子浓度为Er³⁺离子浓度6倍时光致发光强度达到最大值,半高宽也提高到80nm。同时我们还发现了掺Yb对Er³⁺的光致荧光光谱的展宽作用,并讨论了荧光光谱的展宽机制。对于掺Er氟化物玻璃陶瓷,在980nm激光的泵浦下,我们观察到了明亮的上转换荧光,上转换波长分布在红光、绿光、蓝绿光和紫光波段。通过分析泵浦能量对上转换荧光光强的影响,我们给出了个波长上转换荧光的能级跃迁过程。更多还原

【Abstract】 Er-doped and Er/Yb co-doped soda-silicate laser glasses with various concentrations of Er and Yb were fabricated. The absoiption and the photoluminescence (PL) spectra were measured and analyzed. For the Er-doped soda-silicate glasses, the optimum Er concentration for the PL intensity at 1536 nm turns out to be 0.5 at.% and the full width at half maximum (FWHM) of PL spectrum increases from 18 to 26 nm with increasing the doping concentration from 0.1 to 0.8 at.%. In the Er/Yb co-doped soda-silicate glasses with an Er concentration of 0.5 at.%, the PL intensity is enhanced by about 4 times, and the optimum Yb concentration for the PL intensity at 1536 nm is analyzed to be 3.0 at.%. The PL spectrum becomes broader with increasing the Yb concentration, up to a FWHM of 80 nm for 6.0 at.% Yb. The relationship between absorption and PL spectra, and the mechanism of PL broadening have also been addressed. For the Er-doped fluoride ceramic glass, bright fluorescence has been observed, pumped by the 980-nm. The energy transfer mechanism has been figured out through the analysis of the dependence of the fluorescence intensity on the pump power.更多还原