【摘 要】
：
采用高温熔融退火法制备了一系列Er3 /Tm3 共掺碲酸盐玻璃，通过测量玻璃样品的热差扫描(DSC)曲线、吸收光谱、荧光光谱和荧光衰减曲线，结合计算Tm3 离子的Judd-Ofelt强度参数、自发辐射跃迁几率和辐射寿命等光谱参数，对800 nm激光二极管(LD)抽运下Tm3 离子的1.85 μm波段红外光谱特性进行了研究。结果显示，Er3 /Tm3 共掺碲酸盐玻璃具有良好的热稳定性，并随着玻璃中Tm3 离子掺杂浓度的增加，Er3 离子1.53 μm波段荧光强度迅速减小，而Tm3 离子1.85 μm波段荧光
【机 构】
：
宁波大学信息科学与工程学院,浙江宁波315211宁波大学红外材料及器件实验室,浙江宁波315211
论文部分内容阅读
采用高温熔融退火法制备了一系列Er3 /Tm3 共掺碲酸盐玻璃，通过测量玻璃样品的热差扫描(DSC)曲线、吸收光谱、荧光光谱和荧光衰减曲线，结合计算Tm3 离子的Judd-Ofelt强度参数、自发辐射跃迁几率和辐射寿命等光谱参数，对800 nm激光二极管(LD)抽运下Tm3 离子的1.85 μm波段红外光谱特性进行了研究。结果显示，Er3 /Tm3 共掺碲酸盐玻璃具有良好的热稳定性，并随着玻璃中Tm3 离子掺杂浓度的增加，Er3 离子1.53 μm波段荧光强度迅速减小，而Tm3 离子1.85 μm波段荧光强度相应增大。对Tm3 离子的1.85 μm波段发光过程分析表明，Tm3 离子红外荧光强度的增强归结于Tm3 3H4→ Er3 4I9/2、Er3 4I11/2→Tm3 3H5及Er3 4I13/2→Tm3 3F4能级间能量传递的结果，由此进一步计算了能量传递微观系数、临界半径和声子贡献比。研究表明，Er3 /Tm3 共掺碲酸盐玻璃有望作为1.85 μm波段光纤激光器的候选材料.
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