长波红外硫系玻璃光纤束制备与大面阵成像性能研究(特邀)  

Preparation and imaging properties of coherent chalcogenide glass fiber bundles with large planar array for far-infrared transmission(invited)

作　　者：刘晓刚 许彦涛[2] 郭海涛[2] 闫兴涛[2] 孔德鹏[2] 沈晓明 常燕杰 张豪 Liu Xiaogang;Xu Yantao;Guo Haitao;Yan Xingtao;Kong Depeng;Shen Xiaoming;Chang Yanjie;Zhang Hao(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China;Research Laboratory of Photonic Functional Materials and Devices,Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences,Xi’an 710119,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004 [2]中国科学院西安光学精密机械研究所光子功能材料与器件研究室,陕西西安710119 [3]中国科学院大学,北京100049

出　　处：《红外与激光工程》2023年第5期90-96,共7页Infrared and Laser Engineering

基　　金：国家自然科学基金(62090063,61935006);陕西省重点研发计划(2023-YBGY-426);广东省光纤传感与通信技术重点实验室开放基金。

摘　　要：长波红外光纤传像束在军事、医疗以及环境监测等领域有着重要应用。当前,长波红外光纤高的光学损耗制约了红外光纤传像束的性能和应用。为了制备低损耗长波红外光纤,选择As-SeTe硫系玻璃组分,首先对As、Se、Te高纯原料进行了提纯工艺研究,原料表面氧杂质含量分别由1.3 at%、0.46 at%、0.48 at%降至0 at%(未检出)、0.06 at%、0.15 at%,除氧效果显著。以As-Se-Te玻璃为基质组分,对比研究了制备工艺对玻璃红外透过谱段的影响,采用Al作为除氧剂结合蒸馏提纯工艺,制备出热学性能优异、长波红外谱段良好的红外硫系玻璃。采用棒管法拉制出丝径100μm的光纤,弯曲半径小于5 mm,在长波红外波段损耗基线约为0.2 dB/m。采用叠片法制备出像元2.25万,单丝呈紧密排列的光纤传像束,断丝率小于3‰,传像束有效区域透过均匀,无黑丝、暗丝,对红外目标成像清晰,无明显畸变,综合成像质量良好。Objective The 8-10μm far-infrared spectrum is in the infrared radiation band at natural temperatures and covers the characteristic"fingerprint spectrum"of many molecules,so it has important applications in the military,medical and environmental monitoring fields.Infrared coherent fiber bundles which can realize the flexible transmission of infrared image are the basic components for assembling various infrared optical systems,and they can be used in the narrow space,high-intensity electric or magnetic field in particular.The main types of far infrared fibers mainly include crystal fiber,hollow fiber,photonic crystal fiber and Te-based chalcogenide glass fiber.Among them,Te-based fiber is an excellent far-infrared transmission material due to its wide transmission band,stable thermal,chemical properties,which means it is especially suitable for the preparation of coherent optical fiber bundles with large array.Until now,a series of components such as Ge-As-Se-Te,GeTe-AgI,Ga-Ge-Te,Ge-Te-I and As-Se-Te have been studied.However,the optical loss of Te-base fiber is still higher at present,which limits the transmission distance of infrared signal and the resolution of the infrared bundles.Therefore,it is necessary to study the purification technology for optimizing the optical loss.Methods High purity raw materials of As,Se and Te were purified by multi-distillation purification technique and the content of O element was examined by EPMA.As-Se-Te chalcogenide glass was chosen and melted by different preparation process and their infrared transmission spectra were measured by FTIR.The optical fiber was drawn by the rod-in-tube method.The drawing temperature was 240℃with the accuracy of±0.2℃,and the drawing speed was about 10 m/min.The coherent fiber bundle was prepared by ribbon-stacking technique.The end face was observed by microscope.Infrared image was detected by home-made optical system and mercury cadmium telluride detector was used(Fig.2).Results and Discussions The oxygen content of As,Se,Te raw materials

关 键 词：硫系玻璃 长波红外光纤 低损耗 传像束 红外成像 

分 类 号：TN213[电子电信—物理电子学]