Xu Yinsheng, Chen Danping, Wang Wei, Zhang Qiang, Zeng Huidan, Shen Ce, Chen Guorong
Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China.
Opt Lett. 2008 Oct 15;33(20):2293-5. doi: 10.1364/ol.33.002293.
The near-IR emission spectra of Er3+-Tm3+ codoped 70GeS2-20In2S3-10CsI chalcohalide glasses were studied with an 808 nm laser as an excitation source. A broad emission extending from 1.35 to 1.7 microm with a FWHM of approximately 160 nm was recorded in a 0.1 mol.% Er2S3, 0.5 mol.% Tm2S3 codoped chalcohalide glass. The fluorescence decay curves of glasses were measured by monitoring the emissions of Tm3+ at 1460 nm and Er3+ at 1540 nm, and the lifetimes were obtained from the first-order exponential fit. The luminescence mechanism and the possible energy-transfer processes are discussed with respect to the energy-level diagram of Er3+ and Tm3+ ions.
以808 nm激光作为激发源，研究了掺铒（Er3+）-掺铥（Tm3+）的70GeS2-20In2S3-10CsI硫卤化物玻璃的近红外发射光谱。在掺有0.1 mol.% Er2S3、0.5 mol.% Tm2S3的硫卤化物玻璃中记录到了一条从1.35至1.7微米的宽发射带，其半高宽约为160 nm。通过监测1460 nm处Tm3+的发射和1540 nm处Er3+的发射来测量玻璃的荧光衰减曲线，并从一阶指数拟合中获得寿命。结合Er3+和Tm3+离子的能级图讨论了发光机制和可能的能量转移过程。
