光纤拼接结构型应变不敏感温度传感器  

StrainInsensitive Temperature Sensor Based on Optical Fiber Splicing Structure

作　　者：宋小亚 刘颖刚[1] 李博文[1] 黄亮[1] 董婧斐 禹大宽[1] 冯德全[1] SONG Xiaoya;LIU Yinggang;LI Bowen;HUANG Liang;DONG Jingfei;YU Dakuan;FENG Dequan(Shaanxi Engineering Research Center of Oil and Gas Resource Optical Fiber Detection & Shaanxi Key Laboratory of Measurement and Control Technology for Oil and GasWells, Xi’an Shiyou University, Xi’an 710065, China)

机构地区：[1]西安石油大学陕西省油气资源光纤探测工程研究中心和陕西省油气井测控技术重点实验室,陕西西安710065

出　　处：《压电与声光》2021年第1期99-103,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(61805197);陕西省自然科学基础研究计划基金资助项目(2013JM8032);陕西省教育厅科研计划基金资助项目(20JS122);西安石油大学研究生创新基金资助项目(YCS19211033)。

摘　　要：设计并制作了一种基于七芯光纤的应变不敏感温度传感器。该传感器将一段七芯光纤与两段单模光纤进行熔接,通过优化熔接参数在熔接点处形成两个分别充当光路分束器和耦合器的凸锥结构,构成了马赫-曾德尔干涉仪(MZI)。实验研究了该传感器对温度和应变的响应特性。结果表明,传感器的光谱对应变不敏感,但传感器对温度具有良好的线性响应特性,在40~200℃内,其谐振光谱波长随温度升高线性红移,对应温度灵敏度达到93.11 pm/℃,波长漂移线性度达99.4%。A strain insensitive temperature sensor based on seven-core fiber(SCF)was designed and manufactured.A short section of SCF was fused between two segments of single-mode fiber(SMF),and two tapers acted as optical splitter and coupler at the splicing point were formed by optimizing splicing parameters,forming a fiber Mach-Zehnder interferometer(MZI).The response characteristics of the sensor to temperature and strain were experimentally investigated.The results show that the spectrum of the sensor is insensitive to strain,but has a good linear response to temperature.In the range of 40~200℃,the wavelength of the resonant spectrum has a linear red shifts with the increase of temperature,the corresponding temperature sensitivity is 93.11 pm/℃,and the wavelength drift linearity is 99.4%.

关 键 词：光纤传感器 七芯光纤 温度 应变不敏感 马赫-曾德尔(Mach-Zehnder)传感器 

分 类 号：TN253[电子电信—物理电子学]