Ultra-broadband 1.0 μm band emission spectroscopy in Pr/Nd/Yb tri-doped tellurite glass.

Author(s) Zhu, Y.; Shen, X.; Zhou, M.; Su, X.; Li, J.; Yang, G.; Shao, H.; Zhou, Y.
Journal Spectrochim Acta A Mol Biomol Spectrosc
Date Published 2019 Nov 05

Tellurite glasses doped with trivalent Pr, Nd and Yb ions were prepared using conventional high-temperature melt-quenching technique and their optical absorption, near-infrared emission, X-ray diffraction (XRD), Raman spectrum, and differential scanning calorimeter (DSC) curve were measured. Upon excitation at 488 nm, an ultra-broadband near-infrared emission extending from 800 to 1120 nm was found to appear owing to the overlapping of the emission bands centered at 900 and 1035 nm of Pr, 880 and 1060 nm of Nd as well as 978 nm of Yb, respectively. The energy transfer mechanism among Pr, Nd and Yb ions which was responsible for the observed ultra-broadband near-infrared emission was investigated to understand the luminescent phenomena. In addition, Judd-Ofelt theory was applied to predict the radiative properties of doped rare-earth ions, and some important radiative parameters such as radiative transition probability, branching ratio and radiative lifetime were derived. Meanwhile, the structural information of amorphous nature and vibrational units was revealed by the XRD pattern and Raman spectrum. Also, the DSC curve displayed the good thermal stability to resist thermal damage for studied tellurite glass with high glass transition temperature. The results indicate that Pr/Nd/Yb tri-doped tellurite glass is a promising material for ultra-broadband fiber lasers operating around 1.0 μm near-infrared band.

DOI 10.1016/j.saa.2019.117178
ISSN 1873-3557
Citation Spectrochim Acta A Mol Biomol Spectrosc. 2019;222:117178.

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