具有温度自校准功能的光纤折射率传感器  

Optical fiber refractive index sensor with temperature calibration ability

作　　者：周景会[1] 孙浩[1] 杨珅[1] 忽满利[1] 叶增俍 周利斌[1] 张晓蕾[1] 袁柳通 

机构地区：[1]西北大学物理学院,陕西西安710069

出　　处：《应用光学》2015年第1期140-144,共5页Journal of Applied Optics

基　　金：国家自然科学基金(61377087;61077006);陕西省自然科学基础研究计划项目(S2010JC3655);西北大学研究生创新人才培养项目(YZZ12085)

摘　　要：提出一种具有温度自校准功能的光纤折射率(RI)传感器,传感头结构由2段很短的多模光纤(MMF)之间夹熔一段对折射率不敏感的光纤布拉格光栅(FBG)构成,传感头总长度为14mm,FBG可以为折射率测量提供良好的温度校准功能。实验结果证明,该传感器的折射率灵敏度为126nm。其干涉光谱共振波长的温度灵敏度为35.09pm/℃,用于温度校准的FBG的温度灵敏度为11.14pm/℃。相比于普通的折射率传感器,这种具有温度自校准功能的折射率传感器具有良好的实用前景。We proposed a type of optical fiber refractive index(RI) sensor with the temperature calibration ability .The sensing head consisted of two very short lengths of multimode fiber (MMF) and a length of refractivity‐insensitive fiber Bragg grating (FBG) fused between them , which had a total length of 14 mm .Here the FBG was used as the temperature calibration component for refractivity measurement .The experimental results show that the RI sensitivity of this sen‐sor is about 126 nm ,the temperature sensitivity of the resonance wavelength is 35 .09 pm/℃ , and the temperature sensitivity of the FBG is 11 .14 pm/℃ .Compared with the general refrac‐tive index sensors ,this sensor with a good temperature calibration ability has better application prospect .

关 键 词：光纤传感器 折射率 多模光纤 布拉格光栅 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]