• DocumentCode
    44153
  • Title

    Optical Fiber Humidity Sensor With Porous TiO2/SiO2/TiO2 Coatings on Fiber Tip

  • Author

    Chujia Huang ; Weijing Xie ; Dongwen Lee ; Chongjie Qi ; Minghong Yang ; Min Wang ; Jianguan Tang

  • Author_Institution
    Nat. Eng. Lab. for Fiber Opt. Sensing Technol., Wuhan Univ. of Technol., Wuhan, China
  • Volume
    27
  • Issue
    14
  • fYear
    2015
  • fDate
    July15, 15 2015
  • Firstpage
    1495
  • Lastpage
    1498
  • Abstract
    A multimode optical fiber humidity sensor composed of porous oxide films is demonstrated and optimized. Relative-humidity (RH) sensing is correlated with the shift of interference fringe due to the change of effective refractive index of porous coatings when exposed to different RH environments. An optical interference model that explains the sensing principle is presented, and the fabrication process, such as vacuum degree, baking temperature, is verified. Experimental results show that the average sensitivity is 0.7 nm/%RH (3.3%RH~63%RH), the proposed sensors present high repeatability, little hysteresis, and especially highly sensitive to low and middle moisture measure.
  • Keywords
    fibre optic sensors; humidity sensors; hysteresis; light interference; optical fibre fabrication; optical multilayers; porous materials; refractive index; silicon compounds; titanium compounds; RH environments; TiO2-SiO2-TiO2; baking temperature; effective refractive index; fabrication process; fiber tip; hysteresis; interference fringe; low moisture measure; middle moisture measure; multimode optical fiber humidity sensor; optical interference model; porous TiO2-SiO2-TiO2 coatings; porous oxide films; relative-humidity sensing; repeatability; sensing principle; vacuum degree; Coatings; Films; Humidity; Optical fiber couplers; Optical fiber sensors; Fabry-Perot interferometer; Optical fiber sensors; Porous films; Relative-humidity; optical fiber sensors; porous films; relative-humidity;
  • fLanguage
    English
  • Journal_Title
    Photonics Technology Letters, IEEE
  • Publisher
    ieee
  • ISSN
    1041-1135
  • Type

    jour

  • DOI
    10.1109/LPT.2015.2426726
  • Filename
    7095524
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=44153