Abstract
Intense near-infrared emission located at 1.23 μm wavelength originating from the erbium (Er3+):S-4(3/2) -> I-4(11/2) transition is observed in Er3+-doped fluorotellurite glasses. This emission is mainly contributed by the relatively low phonon energy of the fluorotellurite glass host (similar to 776 cm(-1)). Judd-Ofelt analysis indicates a strong asymmetry and covalent environment between Er3+ ions and ligands in the host matrix. The emission cross-section was calculated to be 2.85 x 10(-21) cm(2) by the Fuchtbauer-Ladenburg equation, and the population inversion is realized according to a simplified evaluation. The results suggest that the fluorotellurite glass system could be a promising candidate for the development of optical amplifiers and lasers operating at the relatively unexplored 1.2 mu m wavelength region. (C) 2013 Elsevier B.V. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 49 - 53 |
| Journal | Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy |
| Volume | 111 |
| DOIs | |
| Publication status | Published - Jul 2013 |
Research Keywords
- Er3+ 1.23 μm emission
- Fluorotellurite glass
- Low phonon energy
- Population inversion
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