Study of Strain and Temperature Simultaneous Measurement Technology Based on Sampled Grating

Abstract

Choice appropriate parameters of the sampled fiber Bragg grating base on the influence of the sampled fiber Bragg grating length, sampling rate, refractive index modulation depth and sampling period to the reflective spectrum of sampled fiber Bragg grating. Get the reflective spectrum of sampled fiber Bragg grating by using transmission matrix method, form the sampled fiber Bragg grating suitable for sensing. Get the strains of the sampled fiber Bragg grating and the data from Temperature-sensor through simulation experiment, then determine the sensing-parameters A, B, C, D by using SPSS13.0 statistics software in regression analysis. Strain measurement ranged from 0με to 1800με，temperature measurement ranged from 0°C to 180°C.