The effects of Nd3+ concentration on the visible fluorescence spectroscopic properties of Nd:(Y0.9La0.1)2O3 transparent ceramics are investigated. Under 270 nm excitation, three emission peaks are observed at 396, 426, and 633 nm. When the Nd3+ concentration is increased, intensities of the peaks at 396 and 426 nm increase while the 633 nm peak become weak due to the fluorescence re-absorption effect. Broad luminescence band centered at 426 nm is observed from the fluorescence spectrum stimulated at 358 nm. The emission intensity increases with the increase of Nd3+ ion content firstly, then decreases owing to the concentration quenching of Nd3+ ions.

Nd0.02Y1.78La0.2O3 transparent ceramic is fabricated by conventional ceramic sintering process. The transparent ceramic has excellent spectroscopic properties, with the absorption cross section of 1.53×10-20 cm2 and broad full width at half maximum (FWHM) of about 8 nm at 806 nm, the emission cross section of 3.57×10-20 cm2 at 1 078 nm, and the decay lifetime of 232 \mu s. For Nd0.02Y1.78La0.2O3 ceramic laser, a maximum continuous wave (CW) laser output power of 1.38 W with a slope efficiency of 22.9% is obtained at 1 079 nm under an 808 nm diode pump.

5 at.-% Yb3+ doped (La0.10Y0.90)2O3 transparent ceramics are fabricated by using commercial nanopowders in H2 atmosphere. Effect of the heat-treatment on the structure, spectral properties of (Yb0.05La0.10Y0.85)2O3 transparent ceramics is investigated. Laser grade ceramic samples are fabricated, and a diode-pumped laser is demonstrated, the maximum output power of 920 mW at 1 075 nm is obtained with a slope efficiency of ~31%, the laser pulse as short as 730 fs is also realized at the central wavelength of 1 033 nm.

以Ce:YAG单晶取代传统Ce:YAG荧光粉用于制备白光发光二极管(LED)，研究了Ce:YAG单晶厚度及驱动电压的变化对其发射光谱、色坐标、亮度、光视效能和色温的影响。研究结果表明，在基于Ce:YAG单晶的白光LED中，发射光的色坐标以及蓝光与黄绿光之间的相对强度可通过对Ce:YAG单晶片厚度的改变进行调整。在恒定电压驱动下，白光LED样品的亮度、光视效能和色温均随单晶片厚度的减小而增加。当Ce:YAG单晶厚度为0.6 mm时，可获得较纯的白发射光，并且其色坐标具有较高的可靠性和稳定性，基本不受驱动电压变化的影响。研究结果表明Ce:YAG单晶是一种可用于新型白光LED的理想荧光材料。