微型膜结构全光纤珐珀干涉高温传感器  

Miniature all-fiber Fabry-Perot interferometric high temperature sensor based on a thin film

作　　者：朱涛[1,2] 柯涛[1] 饶云江[1,2] 段德稳[1] 徐敏[1] 

机构地区：[1]重庆大学光电工程学院光电技术及系统教育部重点实验室,重庆400044 [2]电子科技大学通信与信息工程学院宽带光纤传输及通信网络技术教育部重点实验室,四川成都610054

出　　处：《光学精密工程》2010年第5期1054-1059,共6页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.60807019;No.60537040);重庆市自然科学基金资助项目(No.CSTC2008BB2165);新世纪优秀人才支持计划资助项目(No.NCET-08-0602)

摘　　要：制作了一种微型膜结构的全光纤在线珐珀干涉式高温传感器。该传感器是在单模光纤端面依次熔接一段大芯径空芯光纤和一段研磨的多模光纤膜片而构成的,因此,温度引起的珐珀腔光程差改变量由空芯光纤的热膨胀和温度引起腔内压强改变从而改变膜片的扰度两部分组成,从而使相同温度变化下传感器的光程差变化量更大,分辨率更高。实验结果表明,在100～650℃,该传感器单位温度变化的光程差变化量约为1.029 nm,温度分辨率约为1.5℃,测量线性度约为0.996 7,且滞回小,重复性好。这种膜结构的全光纤珐珀干涉式高温传感器因其体积小,温度分辨率高,将在多点高温测量领域有好的应用前景。A miniature all-fiber Fabry-Perot high temperature sensor with a thin film is presented.The sensor is fabricated by splicing a hollow fiber with a grinded multimode fiber thin film on the end of a single mode fiber.The change of the optical path difference of the Fabry-Perot cavity are composed of two parts,the thermal expansion of the hollow fiber and the deflection of the thin film induced by temperature change.As the optical path difference of the sensor is langer than those of common sensors at the same temperature,it can offer a higher sensitivity.A temperature measurement experiment is carried out,results show that the sensor has a linearity of 0.996 7,sensitivity of 1.029 nm/℃ and the resolution of measuring system about 1.5 ℃.It is concluded that the miniature all-fiber Fabry-Perot high temperature sensor with a thin film will be a candidate in the field of micro-region multipoint quasi-distributed high temperature measurement.

关 键 词：光纤传感 高温传感器 珐珀干涉仪 膜结构 

分 类 号：TN253[电子电信—物理电子学]