Abstract
Improving the physicochemical and optical properties of erbium ion-doped fluorotellurite glass is key to addressing the performance bottleneck of current commercial silicon-based fiber amplifiers. In this study, the ZnF2 is used to reduce the hydroxyl content in the tellurite glass matrix, which improved the fluorescence efficiency. Further, the WO3 modifier is introduced to enable the transformation of TeO4→TeO3+δ→TeO3 and the formation of the octahedral [WO6] units and tetrahedral [WO4] units, as demonstrated by Raman spectroscopy and X-ray photoelectron analysis. Finally, Er3+-doped fluorotellurite glass with stable thermal properties is obtained by adjusting the glass topology. Its excellent visible-near-mid-infrared optical properties make it a promising candidate material for infrared fiber amplifiers and gain media for rare-earth-doped solid-state lasers.
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