J0405-2-1 Simultaneous Strain and Temperature Measurements using Polarization-maintaining Fiber Bragg Grating by Optical Frequency Domain Reflectometry

Abstract

The distributed strain sensing system with optical frequency domain reflectometry (OFDR) using fiber Bragg gratings (FBG) can measure distributed strain or temperature at an arbitrary position along an FBG with the high spatial resolution. As well as by the ordinary systems, however, strain measured by the sensing system can be influenced by the variation of temperature. In this study, we implemented simultaneous strain and temperature sensing by using PANDA (Polarization-maintaining AND Absorption-reducing) fiber. Through several experiments, we show that this sensing system can be applied to simultaneous distributed strain "and" temperature sensing.