Fiber Bragg Grating calibrating method base on MCS

Fiber Bragg Grating Demodulation System is the key to put Bragg Grating sensor into practice. The fiber grating sensor the-ory and the demodulation technology is systematically researched in this paper. The main content includes: the principle of fiber grat-ing sensor;the analysis of several technologies of demodulation and the F-P filter demodulation is introduced in detail;the design of demodulation system based on MCS system.Fiber Bragg Grating calibrating method base on MCS can improve precision of Demodula-tion System equal to ±5pm,maximum error ±8pm.