Effects of Nb2O5 on thermal stability and optical properties of Er3+-doped tellurite glasses

• 来源期刊: 中国物理（英文版）
• 关键词: glasses thermal analysis optical materials optical properties
• 年，卷（期）: 2006,（9）
• 页码范围: 2158-2164
• 页数: 7页
• 语种: 英文

摘要

Er3+-doped tellurite glasses with molar compositions of xNb2O5 - (14.7 - x)Na2O-10ZnO-SK2O-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 (7.2×10-21 - 10.7×10-21 cm2)and the gain bandwidth, FWHM×σepeak (274×10-28 -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.