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研究了镱离子掺杂铋酸盐玻璃的发光和激光评估等特性参数,讨论了铋离子等缺陷中心与近红外发光镱离子之间的能量转移。对于已优化的基质组成,玻璃中镱离子于近红外波段的发射截面,在基本保持荧光寿命没有大幅下降的前提下具有了较大提高,增强了激光增益能力,而下降的吸收截面则提高了饱和抽运密度。采用有效的除羟基工艺,使玻璃中羟基含量达到激光玻璃的指标要求,并且羟基与镱离子相互作用的强度参数表明,不会产生比磷酸盐玻璃中更为严重的对镱离子发光的淬灭作用,但铋酸盐玻璃中还可能存在三价铋离子和二价镱离子等价态不稳定的缺陷淬灭中心。
The parameters of luminescence and laser evaluation for the bismuth ion doped bismuth salt glass have been studied. The energy transfer between the defect centers such as bismuth ion and the near-infrared luminescence ytterbium ion has been discussed. For the optimized matrix composition, the emission cross sections of ytterbium ions in the near-infrared region of the glass have been greatly enhanced without substantially decreasing the lifetime of the fluorescence, which enhances the laser gain ability while the decreased absorption cross-section increases Saturated pumping density. The use of an effective dehydroxylation process allows the hydroxyl content in the glass to meet the specification of the laser glass and the strength parameters of the interaction of the hydroxyl group with the ytterbium ion show no more quenching of the ytterbium ion luminescence than in the phosphate glass However, it is possible that the bismuth-acid-based glass may have quenching centers which are unstable in the form of isobaric bismuth ions and divalent ytterbium ions.