摘要
测量了不同掺杂浓度Yb∶YAG晶体氧化和还原气氛退火前后的色心吸收光谱、荧光光谱和荧光寿命 研究了色心对Yb∶YAG晶体的荧光强度和荧光寿命的影响 结果表明 ,只有当Yb的掺杂浓度大于 10at.%时 。
The fluorescence characteristics on active ions in laser crystals are necessary to study. Recently, Yb 3+ doped solid state materials are attractively used as gain media for high efficiency, high power laser. Among the numerous Yb 3+-doped crystals, Yb∶YAG has many other attractive characteristics such as high thermal conductivity, excellent physical and chemical properties of the host material. The trivalent ytterbium ion′s simple 4f 13 electronic structure allows for no excited state absorption, upconversion or low concentration quenching even at high doping concentration of Yb 3+ ions. The color center absorption spectra,fluorescence spectra and fluorescence lifetimes of Yb∶YAG as-grown and after annealing with different doping level were measured at room temperature. The effect of color centers on fluorescence intensity and lifetime of Yb∶YAG was also investigated. The color centers do not react on the quenching solely, it aggravates the concentration quenching until the doping level is larger than 10 at.%.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2004年第6期697-699,共3页
Acta Photonica Sinica
基金
国家高技术研究发展计划 (86 3)资助 (2 0 0 2AA3110 30 )
关键词
YB:YAG晶体
色心吸收
荧光光谱
荧光寿命
浓度猝灭
Yb∶YAG crystal
Color center absorption
Fluorescence spectrum
Fluorescence lifetime
Concentration quenching
