关键词: 掺铒碲酸盐玻璃, 热力学稳定性, 光谱特性

Abstract:

Nb₂ O₅was doped into the Er“ -doped tellurite glass to improve its thermal stability. The absorption spectra.fluorescence spectra and therm al stability parameters of the four types of Er³⁺-doped tellurite glass were in.vestigated.The Judd-Ofelt intension parametersΩ_t ( Ω₂=(5.99~10.38)×10 ^-20cm ,Ω₄= (1.91~2.67)×10^-20cm² ,Ω₆=(0.92~1.28)×10^-20cm² )were then calculated by means of Judd.Ofelt theory.Moreover,the stimulated emission cross section was calculated by McCumber theory ,and the effects of diferent compositions on the spectroscopic property and therm al stability of the glass were compared.The results show that the Er3 .doped 0.70TeO₂-0.15ZnO-0.05BaO-0.10Nb₂ O₅ glass is of excellent therm al stability, exhibits a large stimulated emission cross section(10.96 X 10^-20cm²  )and a broad full width at the half maximum(67 nm),and is a suitab le type medium glass for the broadband Er³⁺-doped fiber amplifier

Key words: Er³⁺-doped tellurite glass, therm al stabilities, spectroscopy property