Enhanced 1.8μm emission in Yb3+/Tm3+ co-doped tellurite glass: Effects of Yb3+↔Tm3+ energy transfer and back transfer

BALAJI, Sathravada, BISWAS, Kaushik, SONTAKKE, Atul D, GUPTA, Gaurav and ANNAPURNA, Kalyandurg (2014). Enhanced 1.8μm emission in Yb3+/Tm3+ co-doped tellurite glass: Effects of Yb3+↔Tm3+ energy transfer and back transfer. Journal of Quantitative Spectroscopy and Radiative Transfer, 147, 112-120.

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Abstract

The ~1.8 μm emission characteristics of Tm3+ by a direct excitation and through an energy transfer process upon sensitization with Yb3+ ions in tellurite glass are reported. The spectroscopic properties of Tm3+ ions have been evaluated by applying Judd–Ofelt theory on the measured absorption spectrum. The obtained intensity parameters, Ω2=7.155×10−20 cm2, Ω4=3.325×10−20 cm2, Ω6=1.278×10−20 cm2 are used to estimate the radiative properties of Tm3+ ions in the present glass host. A ~10 fold enhancement in the Tm3+ 1.8 μm emission observed with 16 fold reduced emission of Yb3+ ions (1008 nm) in co-doped sample on Yb3+ ions excitation illustrates the efficient energy transfer from Yb3+: 2F5/2→Tm3+: 3H5. The energy transfer process assisted by host phonon energy has been discussed by using relevant theoretical models and estimated the energy transfer micro-parameters. Effect of energy back transfer Tm3+→Yb3+ on NIR and upconversion emissions have been discussed. An efficient ~1.8 μm with comparatively higher emission cross-section 1.115×10−20 cm2 on account of reduced upconversion emissions has been achieved in the present tellurite glass.

Item Type:	Article
Uncontrolled Keywords:	Meteorology & Atmospheric Sciences; 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0306 Physical Chemistry (incl. Structural); 0401 Atmospheric Sciences
Identification Number:	https://doi.org/10.1016/j.jqsrt.2014.05.025
Page Range:	112-120
SWORD Depositor:	Symplectic Elements
Depositing User:	Symplectic Elements
Date Deposited:	14 Apr 2021 15:39
Last Modified:	14 Apr 2021 15:39
URI:	https://shura.shu.ac.uk/id/eprint/27135

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