摘要
设计了一款基于光纤法布里-珀罗(F-P)干涉仪型的位移传感器。首先将单模光纤和无芯光纤拼接在一起,把无芯光纤的末端切成平面,然后把该结构固定在精密位移平台上,最后在无芯光纤末端位置处垂直放置一面全反镜,构成一个复合的F-P干涉仪。实验中,调节精密位移平台上的千分尺来改变无芯光纤与平面镜镜面的距离,从而改变F-P干涉仪的腔长。实验结果表明,干涉仪的反射谱谐振峰中心波长随位移变化发生线性漂移,通过考察中心波长漂移量实现位移量的精确测量。实验获得传感器最大位移灵敏度为-80.95 pm/μm,测量最大位移量为160μm。设计的光纤位移传感器结构简单,易制作及灵敏度高,在航空航天、海底探测等精度要求较高的微位移测量场合具有一定的应用前景。
A displacement sensor based on fiber Fabry-Perot(F-P)interferometers is designed in this paper.First,a single mode fiber and a coreless fiber are spliced together,and the end of coreless fiber is cut into a plane.Then,the structure is fixed on a precise displacement platform.Finally,a plane mirror is placed vertically at the end of the coreless fiber to form a composite F-P interferometer.In the experiment,the cavity length of the F-P interferometer is changed by adjusting the micrometer on the precision displacement platform to change the distance between the coreless fiber and the plane mirror.The experimental results show that the center wavelength of the resonance peak of the reflection spectrum of the interferometer shifts linearly with the change of the displacement,and the displacement can be accurately measured by observing the center wavelength shift.The maximum displacement sensitivity of the sensor is-80.95 pm/μm,and the measured maximum displacement is 160μm.The designed optical fiber displacement sensor has the advantages of simple structure,easy fabrication and high sensitivity,and has certain application prospects in aerospace,seabed exploration and other micro-displacement measurement occasions that require high accuracy.
作者
陈宁
江超
刘昌宁
陶武强
申万梅
CHEN Ning;JIANG Chao;LIU Changning;TAO Wuqiang;SHEN Wanmei(College of Physics and Electronic Science, Hubei Normal University, Huangshi 435002,China)
出处
《压电与声光》
CAS
北大核心
2021年第2期178-182,共5页
Piezoelectrics & Acoustooptics
基金
湖北省自然科学基金资助项目(青年项目2020CFB46)
2020年度湖北省高等学校优秀中青年科技创新团队计划基金资助项目(T2020014)
湖北师范大学2019年科研创新团队计划基金资助项目(2019CZ09)。
