低损耗Ge-As-Se-Te硫系玻璃远红外光纤的性能分析  

Investigation on Ge-As-Se-Te chalcogenide glasses for far-infrared fiber

作　　者：赵浙明[1,2,3] 吴波[1,3] 刘雅洁[2] 江岭[1,3] 密楠 王训四[1,3] 刘自军[1,3] 刘硕[1,3] 潘章豪 聂秋华[1,3] 戴世勋[1,3] 

机构地区：[1]宁波大学信息科学与工程学院,高等技术研究院,红外材料与器件实验室,宁波315211 [2]嘉兴学院南湖学院,嘉兴314001 [3]浙江省光电探测材料及器件重点实验室,宁波315211

出　　处：《物理学报》2016年第12期126-131,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61377099;61177087;61307060);浙江省重中之重学科开放基金(批准号:xkxl1508;xkxl1318);教育部新世纪优秀人才支持计划(批准号:NCET-10-0976);浙江省151人才第三层次;宁波大学王宽诚幸福基金资助的课题~~

摘　　要：中、远红外光学领域的发展,离不开低损耗光波导材料的发展,因此近年来远红外低损耗光纤一直是光学领域的热点之一.本论文在国内首次报道了一种基于挤压法的低损耗远红外光纤制备技术,获得了具有完整结构的远红外光纤,其损耗为:0.46 d B/m@8.7μm,1.31 d B/m@10.6μm,整体低于1 dB/m@7.2—10.3μm.在实验过程中,首先采用传统的熔融淬冷法和蒸馏纯化工艺制备了Ge-As-Se-Te玻璃样品.利用X射线衍射仪和热膨胀仪等测试了玻璃的结构和物理性质,分析了Ge对玻璃热学性质的影响;利用分光光度计、红外光谱仪等研究了玻璃的光谱性质;综合比较了还原剂铝、镁的除氧效果.最后采用挤压法制备了芯包结构光纤.实验结果表明:镁的除氧效果佳,新型挤压制备工艺和有效提纯技术共同推进了硫系光纤损耗的降低,所获得的Ge-As-Se-Te光纤具有远红外广谱应用的潜能(其透光波长接近12μm).With the development of infrared optics, low-loss waveguide materials are required. Especially, low-loss optical fiber development for far-infrared application has become a focus. Chalcogenide Ge-As-Se-Te（GAST） glasses and fibers for far-infrared light are prepared and investigated in this paper. The thermal properties and the infrared transmissions are reported. The influences of oxygen and hydrogen on the glass transmission and fiber attenuation are discussed. Low-loss GAST fiber with a structure of fine core/cladding is reported by a novel extrusion method （0.46 dB/m at 8.7 μm, 1.31 dB/m at 10.6 μm, base loss being under 1 dB/m from 7.2 to 10.3 μm）. Here, the glasses are prepared by traditional vacuum melt-quenching and vapor distillation method. Structure and physical properties of GAST glass system are studied with X ray diffractions and thermal expansion instrument. Optical spectra of GAST glass system are obtained by spectrophotometer and infrared spectrometer. Main purification processes with different oxygen-getters （magnesium and aluminum） are disclosed. The fiber attenuation is measured by the cut-back method with an Fourier transform infrared spectroscopy spectrometer. The lowest loss of this fiber can be reduced to 1.32 dB/m at 10.6 μm, as it has a structure of Ge20As20Se15Te45 core and Ge20As20Se17Te43 cladding. The results show that these glasses are well transparent in a wide infrared window from 1.1 to 22 μm, and these glass fibers can transmit far-infrared light up to 12 μm, thus the GAST glass system is one of good candidates for far-infrared transparent materials. The fiber attenuation can be reduced effectively by the reasonable purification and novel extruded-processing. These fibers are suited for the power delivery of CO2 laser.

关 键 词：GeAsSeTe 硫系玻璃 远红外光纤 低损耗 

分 类 号：TN253[电子电信—物理电子学]