Dy^(3+)/Tm^(3+)共掺GeS_2-Ga_2S_3-PbI_2玻璃的制备及其中红外发光特性研究  

Preparation and the mid-infrared emission properties of Dy^(3+)/Tm^(3+)-codoped GeS_2-Ga_2S_3-PbI_2 glasses

作　　者：邓圣伟[1,2] 徐铁峰[1] 王训四[1] 戴世勋[1] 沈祥[1] 王国祥[1] 聂秋华[1] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]江西省永丰县欧阳修中学,江西永丰331500

出　　处：《光电子．激光》2011年第2期223-227,共5页Journal of Optoelectronics·Laser

基　　金：国家自然基金资助项目(60878042和60978058);中国博士后基金资助项目(20080430204);宁波市科技创新团队资助项目(2009B21007);宁波大学王宽城幸福基金资助

摘　　要：用熔融淬冷法制备了Dy3+/Tm3+共掺(100-x)(0.8GeS2-0.2Ga2S3)-xPbI2(mol%,x=5,10,15,20)系列玻璃样品,测试了样品热稳定性、折射率、吸收光谱、近红外及中红外荧光光谱,研究了Tm3+浓度和PbI2含量对样品中红外发光特性的影响。在Dy3+/Tm3+共掺样品中,随着PbI2含量的增加,降低了样品中[S3(Ga)Ge-Ge(Ga)S3]类乙烷结构单元的数量,从而提高了Tm3+:3F4→Dy3+:6H11/2能量传递效率,增强了中红外荧光输出。计算了0.3 wt%Dy3+/0.6 wt%Tm3+共掺64GeS2-16Ga2S3-20PbI2玻璃在2 933和4 315 nm处的发射截面值eσmi分别为2.23×10-20cm2和1.35×10-20cm2。研究结果表明,GeS2-Ga2S3-PbI2硫卤玻璃有望成为光纤放大器及中红外激光器的候选材料。A serials of Dy3＋/Tm3＋-codoped（100-x）（0.8GeS2-0.2Ga2S3）-xPbI2（x=5,10,15 and 20,in mol） chalcohalide glasses were synthesized by melt-quenching technique and the properties of glass samples including thermal stability,absorption spectra,near-and mid-infrared fluorescence were measured.The effects of Tm3＋ and PbI2 contents on the mid-infrared fluorescence properties of glasses were investigated.In the Dy3＋/Tm3＋-codoped glasses,the amount of ethanelike units [S3（Ga）Ge-Ge（Ga）S3] is diminished with the increase of PbI2,so the energy transfer efficiency of Tm3＋：3F4 to Dy3＋：6H11/2 is improved and the mid-infrared emission is enhanced.The emission cross sections（σemi） of the 2 933 nm and 4 315 nm fluorescences are estimated to be 2.23×10-20 cm2 and 1.35×10-20 cm2,respectively for the 0.3 wt% Dy3＋ and 0.6 wt% Tm3＋-codoped 64GeS2-16Ga2S3-20PbI2 glasses.These novel chalcohalide glasses may become promising candidate materials for fiber-amplifers and mid-infrared laser devices.

关 键 词：中红外发光 PbI2含量 Dy3+/Tm3+共掺 能量传递 

分 类 号：TQ171.734[化学工程—玻璃工业]