可见光激光晶体Sm^(3+)∶CaDyAlO_(4)的光学性能  

Optical Properties of Visible Laser Crystal Sm^(3+)∶CaDyAlO_(4)

作　　者：谭慧瑜 张沛雄 牛晓晨 宋家万 郑为比 陈言 李真 陈振强[1,2] TAN Hui-yu;ZHANG Pei-xiong;NIU Xiao-chen;SONG Jia-wan;ZHENG Wei-bi;CHEN Yan;LI Zhen;CHEN Zhen-qiang(Guangdong Engineering Research Center of Crystal and Laser Technology,Guangzhou 510632,China;Department of Optoelectronic Engineering,College of Science and Technology,Jinan University,Guangzhou 510632,China)

机构地区：[1]广东省晶体与激光技术工程研究中心,广东广州510632 [2]暨南大学理工学院光电工程系,广东广州510632

出　　处：《发光学报》2022年第11期1741-1749,共9页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51972149,61935010,51872307,51702124);广东省重点领域研发计划(2020B090922006)资助项目。

摘　　要：采用提拉法成功地生长了Sm^(3+)掺杂CaDyAlO_(4)晶体,并对其可见光光学性能进行研究,利用Judd‑Ofelt理论,得到强度参数、自发辐射概率及荧光分支比等重要的光谱性能参数。该晶体在353 nm处吸收峰最强,半高宽(FWHM)为13 nm,吸收截面为1.11×10^(-20) cm^(2);在353 nm激发下,获得了500~650 nm的超宽带橙黄光发射,Dy^(3+)离子和Sm^(3+)离子的主要发射峰分别位于570 nm和620 nm处,发射截面分别为4.15×10^(-20) cm^(2)和4.03×10^(-20) cm^(2)。上述结果表明,Sm^(3+)∶CaDyAlO_(4)晶体可能是500~650 nm橙黄色调谐激光器的一种有前景的增益材料。The Czochralski method was used to successfully grow the Sm^(3+)-doped CaDyAlO_(4)crystal,and its optical properties in visible light were investigated.Important spectral performance parameters such as intensity parameters,spontaneous emission probability,and fluorescence branching ratio were obtained using the Judd-Ofelt theory.The crystal has a strong absorption peak at 353 nm,a full width at half maximum(FWHM)of 13 nm,and an absorption cross section of 9.76×10^(-20) cm^(2).When excited at 353 nm,an ultra-broadband orange-yellow emission from 500 nm to 650 nm is obtained,with Dy^(3+)ions and Sm^(3+)ions.The main emission peaks of Dy^(3+)ions and Sm^(3+)ions are at 570 nm and 620 nm,respectively,and the emission cross sections are 4.15×10^(-20) cm^(2) and 4.03×10^(-20) cm^(2),respectively.The above findings suggest that Sm^(3+)∶CaDyAlO_(4)crystals could be a promising gain material for orange-yellow tunable lasers from 500 nm to 650 nm.

关 键 词：激光晶体 Sm^(3+)掺杂 JUDD-OFELT理论 橙黄光发射 

分 类 号：O482.31[理学—固体物理]