On the optimization of fiber Bragg grating optical sensor using genetic algorithm to monitor the strain of civil structure with high sensitivity

The effect of strain on civil structures is experimentally studied using fiber Bragg grating (FBG). The genetic algorithm is implemented to optimize the multiple parameters (Poisson's ratio, photoelastic coefficient P-11, and photoelastic coefficient P-12) of the proposed sensor. The optimized results helped in increasing the sensitivity in terms of wavelength shift. It is observed that the proposed FBG provides maximum wavelength shift of 38.16 nm with Poisson's ratio of 1.94, photoelastic coefficient P-11 of 1.994, and photoelastic coefficient P-12 of 1.8103. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)