Highly sensitive fiber optic temperature and strain sensor based on an intrinsic Fabry-Perot interferometer fabricated by a femtosecond laser
Highly sensitive fiber optic temperature and strain sensor based on an intrinsic Fabry-Perot interferometer fabricated by a femtosecond laser
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DOI：
10.1364/ol.44.004833
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发表时间：
2019-10-01
期刊：
影响因子：
3.6
通讯作者：
Antunes, Paulo
中科院分区：
文献类型：
--
作者：
Paixao, Tiago;Araujo, Francisco;Antunes, Paulo
在这封信中，我们报告了一种简单但高灵敏度的传感器，它基于两个内置在标准单模光纤中的本征法布里-珀罗涉仪(FPI)。本文对游标效应进行了简要的理论研究，模拟了灵敏度放大系数随FPI长度的变化关系。在模拟结果的基础上，利用集成了近红外飞秒激光器和电动XYZ平台的定制微加工装置制造了FPI。利用游标效应，获得了145 pm/亩epsilon和927 pm/℃的应变和温度灵敏度。该传感器的性能与其多功能和可定制的配置相结合，允许在恶劣环境下实时和就地监测应变和温度。(C)2019年美国光学学会
In this Letter, we report on a simple, but highly sensitive sensor based on two intrinsic Fabry-Perot interferometers (FPIs) inscribed in a standard single-mode optical fiber. A brief theoretical study on the Vernier effect is presented, in which a simulation of the sensitivity magnification factor dependence on the FPI's length is performed. Based on the simulation results, the FPIs were fabricated using a custom micromachining setup that integrates a near-infrared femtosecond laser and a motorized XYZ platform. Using the Vernier effect, sensitivities of 145 pm/mu epsilon and 927 pm/degrees C were obtained for strain and temperature, respectively. The sensor's performance combined with its versatile and customizable configuration allows real-time and in situ strain and temperature monitoring under harsh environments. (C) 2019 Optical Society of America