MZI/FPI Fiber Optic Dual-parameter Sensor Based on a Double Cone and Air Cavity Structure(Invited)  

基于双锥气腔结构的MZI/FPI光纤双参量传感器(特邀)

作　　者：YUAN Tingxuan ZHAO Lilong REN Jianxin MAO Yaya ULLAH Rahat WU Xiangyu MAO Beibei XIA Wenchao 袁庭轩;赵立龙;任建新;毛雅亚;ULLAH Rahat;吴翔宇;毛贝贝;夏文超(南京信息工程大学物理与光电工程学院光电研究院,南京210044;南京信息工程大学江苏省大气海洋光电探测重点实验室,南京210044;南京信息工程大学江苏省气象光子学与光电探测国际合作联合实验室,南京210044)

机构地区：[1]Institute of Optics and Electronics,Nanjing University of Information Science&Technology,Nanjing 210044,China [2]Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean,Nanjing University of Information Science&Technology,Nanjing 210044,China [3]Jiangsu International Joint Laboratory on Meteorological Photonics and Optoelectronic Detection,Nanjing University of Information Science&Technology,Nanjing 210044,China

出　　处：《光子学报》2024年第10期64-72,共9页Acta Photonica Sinica

基　　金：National Natural Science Foundation of China(Nos.6207509,U2001601,61975084);the Jiangsu Provincial Key Research and Development Program(Nos.BE2022079,BE2022055-2)。

摘　　要：This paper proposes a Mach Zehnder/Fabry Perot Interferometer(MZI/FPI)fiber sensor based on Single-mode Fiber(SMF)and Hollow-core Fiber(HCF),which has high sensitivity to temperature and lateral loads.The proposed device consists of two single-mode fiber cones formed by manually controlling the fusion splicer and an air cavity formed by fusing a section of hollow-core fiber.The structure of the sensor is a double cone cascaded air cavity.At the beginning of the design,we compared the basic transmission spectra of single cone structure and double cone structure experimentally,and therefore chose to use double cone structure and air cavity cascade.Light undergoes its first reflection at the first interface between the single-mode fiber and the air cavity structure,and its second reflection at the second interface between the air cavity structure and the single-mode fiber.The two reflected light waves produced by the two reflections form FP interference,which can be used to measure lateral loads.The transmitted light is excited through the first cone,and a portion of the core mode light is excited to the cladding,while another portion of the core mode light continues to propagate in the core.The light couples at the second cone,and the cladding mode light couples back into the core,forming MZ interference with the core mode light,which can be used to measure temperature.The use of hollow-core fiber to form an air cavity has little effect on transmitted light,while avoiding the problem of crosstalk in dual parameter measurements.By designing temperature and lateral load experiments,this article verifies the sensitivity characteristics of this sensor to temperature and lateral loads.A significant redshift phenomenon was observed in the temperature experiment.A significant redshift phenomenon also occurred in the lateral load experiment.Through wavelength demodulation,the experimental results show that the wavelength sensitivity of the sensor to temperature is 56.29 pm/℃in the range of 30℃to 80℃.The wavelength se提出一种基于单模光纤和中空光纤的Mach-Zehnder/Fabry-Pérot干涉仪(MZI/FPI)光纤传感器,该传感器对温度和横向载荷具有高灵敏度。所提出的装置由两个通过手动控制熔接机形成的单模光纤锥和一个通过熔接一段中空光纤形成的空气腔组成,并通过实验进行了验证。通过波长解调,实验结果表明,在30℃到80℃的范围内,传感器对温度的波长灵敏度为56.29 pm/℃。在0~5 N的范围内,传感器对横向载荷的波长灵敏度为1.123 nm/N。该MZI/FPI混合传感器对温度和横向载荷具有高灵敏度,同时具有结构简单坚固、体积小、生产方便等优点。

关 键 词：Temperature Lateral load Fiber sensor Mach-Zehnder interferometer Fabry-Pérot interferometer 

分 类 号：O436.1[机械工程—光学工程]