Effects of Nb2O5 on thermal stability and optical properties of Er3+-doped tellurite glasses |
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| Authors: | Zhao Chun Zhang Qin-Yuan Pan Yue-Xiao and Jiang Zhong-Hong |
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| Institution: | Key Laboratory of Special Functional Materials and Advanced Manufacturing Technology (Ministry of Education) and Institute of Optical Communications, South China University of Technology,Guangzhou 510641,China; Key Laboratory of Special Functional Materials and Advanced Manufacturing Technology (Ministry of Education) and Institute of Optical Communications, South China University of Technology,Guangzhou 510641,China ;College of Applied Physics, South China Univ |
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| Abstract: | Er3+-doped tellurite glasses with molar compositions of
xNb2O5-(14.7-x)Na2O--10ZnO--5K2O--10GeO2--
60TeO2--0.3Er2O3
(x=0, 3, 5, 7 and 9) have been investigated for developing 1.5~μm
fibre and planar amplifiers. The effects of Nb2O5 on the thermal stability
and optical properties of Er3+-doped tellurite glasses have been discussed.
It is noted that the incorporation of Nb2O5 (x=5) increases the thermal
stability of tellurite glasses significantly. Er3+-doped niobium tellurite
glasses exhibit a large stimulated emission cross-section (7.2\times 10-21-
10.7×10-21~cm2 and the gain bandwidth, FWHM×\sigmae^{\rm peak} (274\times 10-28 - 480×10-28~cm3), which are
significantly higher than that of silicate and phosphate glasses. In addition, the
intensity of upconversion luminescence of the Er3+-doped niobium tellurite
glasses decreases rapidly with increasing Nb2O5 content. As a result,
Er3+-doped niobium tellurite glasses might be a potential candidate for
developing laser or optical amplifier devices. |
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| Keywords: | glasses thermal analysis optical materials optical properties |
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