In this paper Tm-doped tellurite glasses (75TeO2-20ZnO-5 Na2O, mol%) were prepared and characterized, and codoping with Yb was investigated in order to improve pump efficiency and wavelength emission range. Emission spectra and lifetime measurements were obtained by pumping Tm-doped tellurite glasses at 800 nm and Yb-Tm co-doped tellurite glasses at 980 nm, thus exploiting the Yb-Tm energy transfer mechanism. Highly Yb-doped Tm-tellurite glasses were investigated (Yb2O3 concentrations up to 5 wt%) and an increase in 3F4 lifetime with Yb2O3 concentrations higher than 3% was observed. This showed that high amounts of Yb do not affect lifetime of the metastable state, thus allowing investigation of lasers in this range of doping concentrations.

Novel rare earth doped tellurite glasses for fiber lasers in the 2-micron wavelength region / Milanese, Daniel; Vota, M; Guihua, L; Ferraris, Monica; Coluccelli, N; Taccheo, S.. - ELETTRONICO. - 6469:(2007), pp. 1-6. (Intervento presentato al convegno SPIE Photonics West 2007 tenutosi a San Jose' (USA) nel 20-26 January 2007) [10.1117/12.702237].

Novel rare earth doped tellurite glasses for fiber lasers in the 2-micron wavelength region

MILANESE, DANIEL;FERRARIS, Monica;TACCHEO S.
2007

Abstract

In this paper Tm-doped tellurite glasses (75TeO2-20ZnO-5 Na2O, mol%) were prepared and characterized, and codoping with Yb was investigated in order to improve pump efficiency and wavelength emission range. Emission spectra and lifetime measurements were obtained by pumping Tm-doped tellurite glasses at 800 nm and Yb-Tm co-doped tellurite glasses at 980 nm, thus exploiting the Yb-Tm energy transfer mechanism. Highly Yb-doped Tm-tellurite glasses were investigated (Yb2O3 concentrations up to 5 wt%) and an increase in 3F4 lifetime with Yb2O3 concentrations higher than 3% was observed. This showed that high amounts of Yb do not affect lifetime of the metastable state, thus allowing investigation of lasers in this range of doping concentrations.
2007
9780819465825
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1544026
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