Research and Design of Fiber Grating Temperature Sensing System Based on Interferometric Demodulation Technique

摘要

Aimed at the deficiency that non-equilibrium M-Z interferometric demodulation method only applies to dynamic demodulation systems and according to the characteristic that there is a linear relationship or near-linear relationship between wavelength shift and demodulation parameters (light intensity or transmission rate, etc) caused by the change of measured field physical quantity, this paper designs a kind of fiber Bragg grating linear demodulation sensor which demodulates Bragg wavelength by linear demodulation method and it realizes the measurement of quasi-static parameters. Apply this design scheme to the design of fiber grating temperature sensing system and experiments show that the system finishes research requirements according to schedule.