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Sensors and actuators. A, Physical v.269, 2018년, pp.313 - 321   SCI SCIE
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Nafion film temperature/humidity sensing based on optical fiber Fabry-Perot interference

Liu, Shuangqiang (Key Lab of In-fiber Integrated Optics, Ministry Education of China, College of Science, Harbin Engineering University, Harbin 150080, China ) ; Ji, Yingke (Key Lab of In-fiber Integrated Optics, Ministry Education of China, College of Science, Harbin Engineering University, Harbin 150080, China ) ; Yang, Jun (Key Lab of In-fiber Integrated Optics, Ministry Education of China, College of Science, Harbin Engineering University, Harbin 150080, China ) ; Sun, Weimin (Key Lab of In-fiber Integrated Optics, Ministry Education of China, College of Science, Harbin Engineering University, Harbin 150080, China ) ; Li, Hanyang (Key Lab of In-fiber Integrated Optics, Ministry Education of China, College of Science, Harbin Engineering University, Harbin 150080, China ) ;
  • 초록  

    Abstract A simple method based on Capillary action is proposed to fabricate an optical fiber Fabry-Perot sensing probe for temperature and humidity measurement. Nafion film serves as the thermal and humidity sensing material in this optical fiber sensor. The sensor is constructed by manually depositing a drop of Nafion solution in the capillary and inserting a single mode optical fiber into the capillary. For humidity sensing, we use a fiber Bragg grating (FBG) as temperature compensator. The sensitivity, repeatability, and stability of the sensor were evaluated by analyzing the reflection spectra of the interference fringes. The results indicate that Nafion can be used as the sensing phase of an optical fiber temperature and humidity sensor based on the optical fiber Fabry-Perot interference, presenting a sensitivity of 2.71nm/°C and 3.78nm/%RH. Highlights Fiber optic temperature and humidity sensing based on spectral interferometry was proposed and demonstrated. Nafion film firstly was first used as the thermal sensing material in our optical fiber sensor. We realize the simultaneous measurement of temperature and humidity based on Nafion film. We use a fiber Bragg grating (FBG) as temperature compensator for humidity sensing.


  • 주제어

    Temperature sensor .   Humidity sensor .   Fabry-Perot .   Nafion film.  

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