基于摩尔组分比为x(GeO2):x(Al2O3):x(NaF):x(CaF2):x(ErF3)=54:20:6:20:2的锗酸盐玻璃,制备出了透明的氧氟微晶玻璃,并研究了Er3+的上转换以及近红外发光特性。结果表明,采用两步法热处理,微晶玻璃中析出了纳米级别的CaF2微晶,且具有较好的可见透明性;由于局域环境声子能量的降低,在980 nm激光二极管(LD)抽运下,Er3+在微晶玻璃中的可见上转换发光较玻璃中大大增强,其红色和绿色上转换发光过程是一个双光子吸收过程,蓝色发光则为三光子吸收过程,近红外发光则相比基质玻璃中有所减弱。掺铒透明氧氟锗酸盐微晶玻璃是一种综合性能优异的主动光学材料。

The transparent geramanate glass ceramics with a mole composition ratio of x(GeO2):x(Al2O3):x(NaF):x(CaF2):x(ErF3)=54:20:6:20:2 have been prepared.The luminescence properties were studied.Using two-step heat treatment,the CaF2 crystals with nanometer size,could be formed in the matrix glass.Excitated by 980 nm LD,the upconversion luminescence intensities of Er3+ ions are significantly higher for the transparent glass ceramics than for the glass,whereas 1.5 μm emission is weaker.The transition is related to two-photon absorption for red (4F9/2→4I15/2) and green (4S3/2→4I15/2) luminescence,and three-photon absorption for blue (2H9/2→4I15/2) luminescence.The Er3+-doped transparent oxy-fluoride germanate glass ceramics is a kind of active optical material with excellent properties.