硅酸盐学报

As2S3硫系玻璃光纤弯曲特性及其对损耗的影响

作者：江丽1 2 戴世勋2 刘永兴2 王训四2 楼慈波1

单位：(1. 宁波大学理学院浙江宁波 3152111 2. 宁波大学高等技术研究院红外材料及器件实验室浙江宁波 315211)

关键词：硫系玻璃硫化砷光纤弯曲强度弯曲损耗

分类号：TQ171

出版年,卷(期):页码：2019,47(2):0-0

DOI：10.14062/j.issn.0454-5648.2019.02.14

摘要：

采用改进的挤压法制备了两种不同直径的多模As2S3硫系光纤，测量了光纤的损耗；采用自行搭建的光纤弯曲强度机械测量装置研究了光纤的弯曲特性，测量了不同弯曲半径下光纤的红外透过光谱，分析了在4.7 ?m波长下弯曲损耗与弯曲半径及光纤直径之间的关系。结果表明：拉制的直径为170 ?m和250 ?m的As2S3光纤最低损耗分别为1.01 dB/m和1.35 dB/m，其平均弯曲强度分别为224.9 MPa和172.4 MPa。光纤红外透过率随弯曲半径减小而呈现逐步下降的趋势，当两种光纤分别弯曲到半径为10 mm和30 mm左右时损耗急剧增加，弯曲半径的断裂极限分别为8.08 mm和22.62 mm。

Two multimode As2S3 chalcogenide fibers with different diameters were prepared by an improved extrusion method, and the corresponding transmission losses of fibers were measured. The bending characteristics of As2S3 fibers were investigated by a bending strength measurement platform. The infrared transmission spectra were measured at different bending radii. Also, the relationships between bending loss and bending radius as well as fiber diameter were analyzed at a wavelength of 4.7 μm. Two As2S3 fibers with the diameters of 170 μm and 250 μm have the minimum losses of 1.01 dB/m and 1.35 dB/m, and the average bending strength are 224.9 MPa and 172.4 MPa, respectively. The infrared transmission rate of fibers decreases with decreasing the bending radius. The fiber transmission losses increase sharply, and the fracture limits of bending radius for these two fibers are 8.08 mm and 22.62 mm, respectively, when the bending radius reduces to 10 mm and 30 mm.

基金项目：

国家自然科学基金(61875094，61435009)；宁波大学王宽诚幸福基金。

作者简介：

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