Er^(3+)掺杂锗酸盐激光玻璃猝灭浓度的计算与预测  

Calculation and Prediction of Quenching Concentration of Er^(3+)-doped Germanate Glass

作　　者：万杰 欧阳莎 姬瑶 段太宇 王伟超 WAN Jie;OUYANG Sha;JI Yao;DUAN Taiyu;WANG Weichao(Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,State Key Laboratory of Luminescent Materials and Devices,School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学物理与光电学院,发光材料与器件国家重点实验室,广东省光纤激光材料与应用技术重点实验室,广东广州510640

出　　处：《发光学报》2023年第6期1032-1041,共10页Chinese Journal of Luminescence

基　　金：国家自然科学基金(52172003)。

摘　　要：稀土掺杂激光玻璃光纤是光纤激光器的核心增益介质,其中稀土离子掺杂浓度是决定激光玻璃增益特性的重要参数,如何快速有效地确定最佳掺杂浓度是稀土掺杂激光玻璃光纤的关键科学问题之一。本文以Er^(3+)掺杂锗酸盐激光玻璃为例,利用Er^(3+):^(4)I_(13/2)→^(4)I_(15/2)跃迁的自发辐射跃迁寿命和实测寿命,预测了锗酸盐激光玻璃的猝灭浓度。研究表明,在该玻璃体系中,理论预测与实际值的最大绝对误差小于0.4%。对比唯象模型和有限扩散模型分别拟合多个样品发光强度和实测寿命确定猝灭浓度的方法,本文提出的方法仅需通过少量样品的测试参数即可确定激光玻璃猝灭浓度,简单快捷且计算误差小,对高增益激光玻璃与光纤研究具有指导意义。Rare-earth doped laser glass fiber is the core gain medium of fiber laser.The concentration of the rareearth ions is one of the important parameters to determine the gain characteristics of laser glass.How to determine the quenching concentration(QC)of laser glass quickly and effectively is a key scientific problem.In this paper,the QC of Er^(3+)-doped germanate glass is predicted by using the spontaneous emission lifetime and the measured lifetime of the Er^(3+):^(4)I_(13/2)→^(4)I_(15/2) transition.The results show that the maximum absolute error between the theoretical prediction and the actual value is less than 0.4%.Compared with the phenomenological model and finite diffusion model to determine the QC by fitting the luminescent intensity and measured lifetime of multiple experimental samples,our proposed method can determine the QC of laser glass by the test parameters of one or two samples,which is simple,fast and has little calculation error.It has a guiding significance for the research of high-gain laser glass and optical fiber.

关 键 词：锗酸盐玻璃 稀土离子 Er^(3+) 猝灭浓度 理论计算 

分 类 号：O482.31[理学—固体物理]