掺镨聚合物光纤的光辐射特性  

Optical Radiative Properties of Pr^(3+)-doped Polymer Optical Fiber

作　　者：姜翠华[1] 郑志强[1] 冯卓宏[1] 许琳琳[1] 李小燕[1] 孔令凯[1] 明海[2] 

机构地区：[1]福建师范大学物理与光电信息科技学院,福州350007 [2]中国科学技术大学物理系,合肥230026

出　　处：《光电工程》2009年第6期76-80,共5页Opto-Electronic Engineering

基　　金：福建省自然科学基金资助项目(A0510014);福建省科技厅资助项目(2006F5025)

摘　　要：制备了Pr(DBM)3Phen掺杂的聚合物光纤,研究了Pr(DBM)3Phen在聚甲基丙烯酸甲酯(PMMA)中的吸收光谱和荧光光谱。根据修正的Judd-Ofelt理论,用吸收光谱计算镨离子在PMMA中的强度参量:Ω2=46.334×10-20cm2,Ω4=18.897×10-20cm2,Ω6=1.610×10-20cm2。用该参量计算镨离子(3P0、1D2)激发态的辐射寿命及各能级之间的辐射跃迁几率和荧光分支比,同时计算了(3P0→3F2、1D2→3H4)受激发射截面。分析表明,Pr(DBM)3Phen掺杂的聚合物光纤有望发展为聚合物光纤放大器和激光器。A Pr-chelate-doped Polymer Optical Fiber （POF） is fabricated. Absorption and emission spectra of Pr^3＋ ions in Pr（DBM）3Phen-doped Polymethyl Methacrylate （PMMA） have been investigated. Based on modifed Judd-Ofelt theory, the intensity parameters of Pr^3＋ in PMMA are calculated to be Ω2=46.334×10^-20 cm^2, Ω4=18.897×10^-20 cm^2, Ω6= 1.610×10^-20 cm^2. The intensity parameters are used to calculate the radiative lifetimes of ^3P0 and ^1D2 levels, the radiative transition rates and the fluorescence branch rations 17. At the same time, the stimulated emission cross-sections σij （^3p0→^3F2,^1D2→^3H4） are calculated. Analysis reveals that Pr （DBM） 3Phen-doped PMMA is promising for use in polymer optical fiber amplifier and laser.

关 键 词：聚合物光纤 修正的Judd—Ofelt 辐射跃迁几率 强度参量 

分 类 号：O433[机械工程—光学工程] TN253[理学—光学]