Te基远红外硫系玻璃光纤的制备及性能分析  

Investigation on Te-based chalcogenide glasses for far-infrared fiber

作　　者：吴波[1,2,3] 赵浙明[4] 王训四[1,2,3] 江岭[1,2,3] 密楠 潘章豪 张培晴[1,2,3] 刘自军[1,2,3] 聂秋华[1,2,3] 戴世勋[1,2,3] 

机构地区：[1]宁波大学高等技术研究院、红外材料与器件实验室,宁波315211 [2]宁波大学信息科学与工程学院,宁波315211 [3]浙江省光电探测材料及器件重点实验室,宁波315211 [4]嘉兴学院南湖学院,嘉兴314001

出　　处：《物理学报》2017年第13期127-133,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61377099,61177087,61307060,61627815);浙江省重中之重学科开放基金(批准号:xkxl1508);教育部新世纪优秀人才(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：随着光学技术由可见向中、远红外等长波长领域的发展,可透远红外的玻璃光纤研究成为近年来光学领域的发展热点之一.传统含Se的Te基硫系光纤无法工作于12μm以上的远红外.本文研究了新型GeTe-AgI硫系玻璃体系的提纯制备,利用挤压技术,制备了阶跃型GeTe-AgI远红外光纤,其光学损耗为:15.6 dB/m@10.6μm,整体低于24 dB/m@8—15μm.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GeTe-AgI高纯玻璃样品.利用差示扫描量热仪、红外椭偏仪、红外光谱仪等测试了玻璃的物理性质和红外透过性能,分析了提纯工艺、AgI原料纯度对玻璃形成以及透过的影响,最后采用分步挤压法制备了芯包结构光纤.实验结果表明:蒸馏提纯和AgI原料纯度对玻璃的透过性能有着决定性的影响,同时Te含量的增加影响了玻璃的抗析晶能力,但新型挤压制备工艺和有效提纯技术共同保障了较低损耗Te基光纤的制备,所获得的GeTe-AgI光纤具有远红外宽谱应用的潜能(工作波段5.5—15μm)并且绿色环保,可以满足CO_2激光的能量传输和远红外传感应用.When infrared（IR） is over 12 μm, conventional chalcogenide（ChG） fibers are confused by the multiphonon absorption of Se, and novel glass materials for far-IR have become one of hot research points in recent years. Here, a novel ChG glass and fiber for far-IR without containing Se/As is well investigated. The glasses GeTe-Ag I are purified by distillation and synthesized by melt-quenching method. The thermal properties and the infrared transmissions are reported. The step-index fiber, fabricated via a novel extrusion method, exhibits excellent transmission at 8–15 μm： 24 dB/m in a range of 8–15 μm and 15.6 dB/m at 10.6 μm. The influences of oxygen contaminant and the purity of Ag I on the glass transmission and fiber attenuation are discussed. Structural and physical properties of GeTe-Ag I glass system are studied with differential scanning calorimetry and ellipsometer instrument. Optical spectra of GeTe-Ag I glass system are obtained by spectrophotometer and infrared spectrometer. Main purification process with oxygen-getters（magnesium）is disclosed. The fiber attenuation is measured by the cut-back method with a Fourier transform infrared spectrometer.The lowest loss of this fiber can be reduced to 15.6 dB/m at 10.6 μm. The results show that these glasses are well transparent in a wide IR window from 1.7 to 25 μm, and these glass fibers can transmit light up to 15 μm, thus the GeTe-AgI glass system is one of good candidates for far-IR. The fiber attenuation can be reduced effectively by the reasonable purification and novel extruded-processing. These environment friendly fibers are suited for far-IR applications, such as greenhouse gas sensing and the power delivery of CO2 laser.

关 键 词：GeTe-AgI 硫系玻璃 远红外光纤 绿色环保 

分 类 号：TN253[电子电信—物理电子学]