Abstract
A fiber loop mirror sensor with a long period grating (LPG) inscribed in the polarization maintaining fiber (PMF) is proposed and experimentally demonstrated for the measurement of humidity and temperature simultaneously. The LPG is inscribed in the PMF by a CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> laser and then connected with a 3-dB coupler to form a fiber loop mirror. The proposed sensor is created through coating a thin layer of polyvinyl alcohol onto the surface of PM-LPG, which can change its refractive index with different humidity levels. The resonance wavelength and its intensity varied with temperature and humidity, so humidity and temperature can be measured simultaneously. The humidity and temperature sensitivity of 0.1723 nm/%RH and 0.2174 nm/°C with the measurement errors of 2.6%RH and 0.2 °C were obtained.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
