Er3+掺杂碲酸盐微晶玻璃光纤的中红外荧光特性  

Er3+-doped Tellurite Glass Ceramic Fiber with Enhanced Mid-infrared Emission

作　　者：康世亮 董国平[1] 邱建荣[2] KANG Shiliang;DONG Guoping;QIU Jianrong(School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China;College of Optical Science and Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]华南理工大学材料科学与工程学院,广州510640 [2]浙江大学光电科学与工程学院,杭州310027

出　　处：《硅酸盐学报》2018年第10期1321-1326,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(61475047,51772101);广东省自然科学杰出青年基金(S2014A030306045)项目

摘　　要：利用管内熔体直拉法制备了Er^3＋掺杂的碲酸盐微晶玻璃光纤,其中碲酸盐玻璃的组成为72TeO2-25PbO-3Er2O3 （mol%）。并研究了其微观结构和光学性能。结果表明：通过这种方法制备的光纤具有良好的芯包结构,没有明显的元素扩散,并且经过适当温度热处理后在光纤中析出尺寸约20 nm的PbTe3O7纳米晶。与前驱体光纤相比,在980 nm激光的泵浦下,2.7μm中红外发光强度在微晶玻璃光纤中得到显著的增强,这主要是由于晶体场效应的影响,其优异的光学性能表明,获得的碲酸盐微晶玻璃光纤有望在中红外光纤放大器和可调谐激光器领域得到应用。Er^3＋-doped tellurite glass ceramic（GC） fiber with a composition of 72TeO2-25PbO-3Er2O3（mol%） was fabricated by a melt-in-tube method. The microstructure and optical properties of GC fiber were investigated. The results show that the obtained fiber exhibits a standard core-cladding configuration, and little elemental diffusion between the fiber core and cladding during the fiber-drawing process occurs. After a proper heat treatment process, the PbTe3O7 nanocrystals with a diameter of approximately 20 nm were precipitated evenly in the glass fiber core. The enhanced 2.7 μm mid-infrared（MIR） emission occurs in the GC fibers due to the efficient crystal field, compared to that of precursor fiber upon excitation with a 980 nm LD. The excellent spectroscopic characteristics of the GC fiber endow its potential applications in MIR amplifier or tunable laser.

关 键 词：管内熔体直拉法 碲酸盐 微晶玻璃光纤 中红外发光 

分 类 号：TQ171[化学工程—玻璃工业]