摘要
硫系玻璃作为一种优秀的红外材料,具有透过范围广、物化性能稳定、易于成纤等特点,是制备红外传能光纤的理想材料之一。从硫系玻璃吸收损耗抑制和散射损耗抑制两方面入手,采用气(氯气)/气(玻璃蒸汽)、固(铝)/液(玻璃熔液)化学反应除杂方式降低光纤吸收损耗,建立了三维激光显微成像系统,检测玻璃及光纤内部的微米和亚微米量级的缺陷,优化制备工艺降低光纤散射损耗,制备出损耗为0.087 dB/m(@4.778μm)的硫系玻璃光纤。分别利用光纤激光器(波长为2.0μm)和双波长输出的光学参量振荡器(OPO)激光器(波长为3.8μm和4.7μm)进行激光传能实验,在单模光纤和多模光纤中分别实现了6.10 W(@2.0μm)和6.12 W(@3.8μm和4.7μm)激光传输。
Objective With the continuous development of infrared optics,the demand for infrared laser transmission in such fields as national defense and security,biomedicine,and advanced manufacturing is becoming increasingly urgent,and therefore infrared energy transmission fibers are receiving increasing attention.The chalcogenide glass,as an excellent infrared material,features a wide transmission range,stable physic-chemical properties,and easy fiber formation,which makes it an ideal material for infrared energy transmission fibers.The high optical loss of domestically produced chalcogenide glass fibers currently limits their widespread applications.The origin of the optical loss for chalcogenide glass fibers mainly includes the absorption loss of C,H,O,and other impurities;scattering loss caused by heterogeneous particle impurities and striae;scattering loss caused by the interface defects between the core and cladding.For suppressing the absorption loss and scattering loss in chalcogenide glasses and obtaining ultra-low loss fibers,gas(chlorine gas)-gas(glass vapor)and solid(aluminum)-liquid(glass melt)chemical reactions are employed to reduce the absorption loss of fibers.A three-dimensional laser microscopic imaging system is established and adopted to detect micron-and submicron-sized defects inside the glass and fiber,and the preparation process is correspondingly optimized to reduce the scattering loss of fibers.The laser energy transmission experiments of fiber laser(wavelength is 2.0μm)and dual wavelength optical parameter oscillator(OPO)laser(wavelength is 3.8μm and 4.7μm)are also carried out.Methods High purity S and As elements are utilized to prepare rod(As40S60)and tube(As39S61).S distilled at 200℃and As sublimed at 350℃are encapsulated in the ampoule and then melted at 750℃for 12 h to obtain preform glasses.Further,hydrogen impurities with the high purity Cl2 are eliminated.Cl2 is introduced into the molten glass and the quantity of flow is 5 ml/min for 300‒600 s.The glass is melted again to a
作者
许彦涛
郭海涛
肖旭升
李曼
闫萌萌
Xu Yantao;Guo Haitao;Xiao Xusheng;Li Man;Yan Mengmeng(State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences,Xi’an 710119,Shaanxi,China;National Key Laboratory of Electromagnetic Space Security,Tianjin 300308,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2024年第7期116-124,共9页
Acta Optica Sinica
基金
国家自然科学基金(61935006,62090063)
陕西省杰出青年基金(2023-JC-JQ-31)、陕西省重点研发计划(2023-YB⁃GY-426)
电磁空间安全全国重点实验室基金。
关键词
材料
红外光纤
硫系玻璃
超低损耗
激光传输
激光损伤
material
infrared fiber
chalcogenide glass
ultra-low loss
laser transmission
laser damage
