用于中红外光纤激光器的高Pr^(3+)掺杂硒化物硫系玻璃和光纤制备及其光谱特性  

Fabrication and Spectroscopic Properties of Heavily Pr^(3+) Doped Selenide Chalcogenide Glass and Fiber for Mid-infrared Fiber Laser

作　　者：许晨煜 崔健 许彦涛[1] 肖旭升[1] 崔晓霞[1] 郭海涛[1,2] XU Chen-yu;CUI Jian;XU Yan-tao;XIAO Xu-sheng;CUI Xiao-xia;GUO Hai-tao(State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi’an 710119,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119 [2]中国科学院大学,北京100049

出　　处：《发光学报》2022年第6期851-861,共11页Chinese Journal of Luminescence

基　　金：国家自然科学基金(62005312,62090065,61935006);中国科学院创新交叉团队项目(JCTD⁃2018⁃19)资助。

摘　　要：为了研发用于3~5μm波段光纤激光器的增益介质,制备了重量百分比为0~0.4%不同浓度Pr^(3+)离子掺杂的Ge_(12)As_(20.8)Ga_(4)Se_(63.2)硒化物硫系玻璃。通过多级棒管法,重量百分比为0.2%的Pr^(3+)离子掺杂玻璃被成功拉制成阶跃型双包层光纤,损耗最低为2.95 dB/m(位于6.58μm处)。采用电子探针显微分析(EPMA)、X射线衍射(XRD)、差示扫描量热(DSC)、场发射透射电子显微镜(FE⁃TEM)、透射光谱和中红外荧光光谱分析了玻璃中Pr^(3+)离子的分散性、杂质含量以及Pr^(3+)离子引入引起的热、光学性质变化。通过玻璃的吸收和发射光谱并结合Judd-Ofelt理论,计算了Judd-Ofelt强度参数、辐射跃迁几率、荧光寿命、荧光分支比和受激发射截面。这种硒化硫系玻璃具有较高的Pr^(3+)离子溶解度和中红外发光特性、良好的热稳定性和成纤性能,表明其具有作为中红外激光工作介质的潜力。In order to develop a high gain medium for fiber lasers operating at 3-5μm waveband,0-0.4%(in weight)Pr^(3+)ions doped Ge_(12)As_(20.8)Ga_(4)Se_(63.2)selenide chalcogenide glasses were prepared and the 0.2%(in weight)Pr^(3+)ions doped one was successfully drawn into step-index double-cladding fiber with the lowest loss of 2.95 dB/m@6.58μm by a multistage rod-in-tube method.The electron-probe measure microanalysis(EPMA),X-ray diffraction(XRD),differential scanning calorimeter(DSC),field emission transmission electron microscope(FE-TEM),trans⁃mission and mid-infrared fluorescence spectra were carried out to analyze the dispersion of Pr^(3+)ions in glass,the im⁃purity contents,thermal and optical changes caused by the Pr^(3+)ions’introduction.By analyzing the absorption and emission measurements of the serial glasses with the Judd-Ofelt theory,the Judd-Ofelt strength parameters,transi⁃tion probabilities,exited state lifetime,branching ratios,and emission cross-sections were also calculated.This sel⁃enide chalcogenide glass has high Pr^(3+)ions’solubility and emission characteristic,good thermal stability and fiber forming performance,indicating that it has potential to be used as mid-infrared laser working medium.

关 键 词：硫系玻璃 稀土离子 光谱学 中红外荧光 红外光纤 

分 类 号：O482.31[理学—固体物理]