Article

Broadband Near-Infrared Emission in Er3+–Tm3+ Codoped Chalcohalide Glasses

Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China.
Optics Letters (Impact Factor: 3.29). 11/2008; 33(20):2293-5. DOI: 10.1364/OL.33.002293
Source: PubMed

ABSTRACT

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.

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Available from: Yinsheng Xu, Oct 14, 2015
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