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Detection of transverse load using the high birefringence bragg grating and genetic algorithm

A novel methodology for detecting the transverse load distribution by fiber Bragg grating sensor (FBG) fabricated into the high birefringence fiber (Hi-Bi FBG sensor) is presented. The transverse force effects on the Hi-Bi FBG sensor area are modeled by evaluating the change of refractive indices along the fiber through the transfer matrix formulation method. Moreover, a genetic algorithm for reconstruction of the non-uniform applied anomaly from the reflected spectrum is developed. The presented method is verified through numerical simulations and the results show that our methodology can effectively represent and model the profile of the applied perturbation profile.