通过研究稀土离子在玻璃中激发态布居数与掺杂浓度之间的关系，建立了一种半定量的激光玻璃发光猝灭浓度预测的研究方法。研究发现，在Nd³⁺掺杂磷酸盐玻璃中，无辐射跃迁速率与浓度的线性相关性大于其与浓度的平方相关性，表明OH^-对无辐射跃迁几率的影响大于稀土离子之间的能量传递过程。选择低浓度下的荧光寿命代替自发辐射跃迁寿命预测猝灭浓度，有效降低了多声子弛豫以及OH^-的影响，预测发光猝灭浓度与实验值的绝对误差从0.82%降低到了0.16%。本文所提出的预测计算方法具有较高的准确性和普适性，这为理论预测激光玻璃的猝灭浓度提供了一定的指导意义，有助于新型激光玻璃的研究和探索。

通过水热法合成了一系列CaSc₂O₄∶Er³⁺，Nd³⁺纳米晶。随着Nd³⁺浓度和激发波长的变化，详细研究了CaSc₂O₄∶Er³⁺，Nd³⁺氧化物在可见光和近红外（NIR）区域的发光特性。在808 nm激发下，Er³⁺离子的发光强度随着Nd³⁺离子浓度的增加出现增强。相对的红色强度也有轻微的增强。在980 nm激发下，Nd³⁺离子几乎不吸收980 nm的光子，只有Er³⁺离子的吸收和发射被发现。相对的红色强度没有变化。此外，在近红外光谱中，只观察到Er³⁺离子的发射，这与可见光光谱一致。详细的研究揭示了新型CaSc₂O₄∶Er³⁺，Nd³⁺纳米晶在808 nm和980 nm近红外激发下的上转换发光（UCL）机制。

Large-size Al3+/Nd3+ co-doped silica glass with 5000 ppm Nd3+ and 50,000 ppm Al3+ doping concentrations was prepared by the modified sol-gel method combined with high-temperature melting and molding technology. Electron probe micro-analyzer tests indicated that high doping homogeneity was achieved with this sample preparation method. The spectral properties of the Nd3+ ions were evaluated. Nd3+-doped silica fiber (NDF) with a core-to-clad ratio of 20/125 μm was drawn from the preform with the Al3+/Nd3+ co-doped silica glass as the core. In the laser oscillation experiment, a maximum output power of 14.6 W at 1.06 μm with a slope efficiency of 39.6% was obtained from the NDF pumped by a commercial 808 nm laser diode. To the best of our knowledge, this is the highest laser power reported for an NDF operated at 1060 nm and prepared by a non-chemical vapor deposition method. In the master oscillator power amplifier experiment, a maximum power of 16.6 W corresponding to a slope efficiency of 30.5% at 1061 nm was also demonstrated. The laser performance of the NDF exhibited the great advantages and potential of the modified sol-gel method in fabricating Nd3+-doped silica glass for a new type of NDFs like large mode area fibers and fibers with large diameter ratio of core/cladding.

稀土的发光和激光性能都是由其4f电子在不同能级之间的跃迁产生的。由于稀土离子的独特性能，使得稀土掺杂光功能玻璃无论作为主动还是被动元器件，均在高功率激光系统发挥着重要作用。掺钕磷酸盐激光玻璃和掺铒磷酸盐激光玻璃，具有高稀土离子掺杂浓度、大尺寸和高均匀制备特性，分别是1 um和1.5 um人眼安全波段重频-大能量激光器的重要增益介质材料；光致热折变玻璃及体光栅器件，可实现波长选择和模式选择功能，具有衍射效率高、热稳定性好和抗损伤阈值高等特点，是高功率激光系统中重要的、多功能元器件。文中主要介绍了上海光机所最近几年在掺钕磷酸盐激光玻璃，掺铒磷酸盐激光玻璃以及掺铈的光致热折变玻璃及体光栅器件的研究进展。