硅酸盐学报

远红外Ge-Te-Se硫系玻璃与光纤

单位：宁波大学信息科学与工程学院浙江宁波 315211 2. Laboratory of Glasses and Ceramics UMR 6226

关键词：Te基硫系玻璃远红外光纤

分类号：TQ171.73

出版年,卷(期):页码：2012,40(7):1006-1010

DOI：

摘要：

摘要：采用传统的熔融–淬冷法制备了系列Ge_xTe₆₅Se₍₃₅_–x) (x=20，22，23，24；摩尔分数，x%) Te基硫系玻璃。利用X射线衍射、差示扫描量热分析、分光光度计、红外光谱仪等设备研究了玻璃的性能。这些玻璃具有良好的热稳定性和红外透过性能。组分为Ge₂₃Te₆₅Se₁₂，Ge₂₄Te₆₅Se₁₁的玻璃的差示扫描量热曲线中没有出现析晶峰，表明玻璃具有良好的抗析晶性能。组分为Ge₂₄Te₆₅Se₁₁的玻璃的转变温度T_g最高，达到了188℃。这些玻璃样品的红外透过范围都很宽，从近红外的1.8μm到远红外的18μm。通过在玻璃的制备工艺中引入蒸馏提纯工艺可以有效减弱杂质吸收峰对玻璃红外透过性能的影响。最后，选用Ge₂₃Te₆₅Se₁₂玻璃作为包层，Ge₂₄Te₆₅Se₁₁玻璃作为纤芯，采用棒管法完成了具有纤芯包层结构的Ge-Te-Se红外光纤的拉制

Abstract: Ge_xTe₆₅Se ₍₃₅_–x₎ (x=20, 22, 23, 24, in mole fraction, x%) Te-based chalcogenide glasses were prepared by a conventional melt–quenching method in a silica tube under vacuum. The performance of these glasses was analyzed by X-ray diffraction, differential scanning calorimetry (DSC), visible/near-infrared (IR) absorption spectroscopy and infrared transmission spectroscopy.These glasses appeared to have excellent thermal stability and transmission properties.There was no crystallization peak on the DSC curve for the two glass compositions, namely, Ge₂₃Te₆₅Se₁₂ and Ge₂₄Te₆₅Se₁₁, indicating a notably enhanced resistance to crystallization and a maximum value of T_g at 188℃ for the glass composition Ge₂₄Te₆₅Se₁₁. The optical transmission window was from 1.8μm in the bandgap region to 18μm in the phonon region. A distillation process that could effectively eliminate the absorption bands in the IR region was used for these glasses. The fabrication (rod-in-tube method) and fiber drawing were both conducted with glass compositions of Ge₂₃Te₆₅Se₁₂ and Ge₂₄Te₆₅Se₁₁ as cladding and core, respectively. The Ge–Te–Se infrared optical fiber with core-cladding structure exhibited good fiber drawing properties.

基金项目：

国家自然科学基金(60878042，60908032，60978058)；宁波市自然科学基金(2010A610171)；浙江省杰出青年基金(R1101263)；宁波大学研究生科研创新基金和国家自然科学基金国际(地区)合作与交流项目资助

作者简介：

第一作者：孙杰(1987—)，男，硕士研究生。通信作者：王训四(1979—)，男，副教授

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