“…Due to the high response of the cladding mode to change in the environment, LPFGs have higher sensitivity than other types of optical fiber grating [ 1 ]. Recently, R&D LPFG-based sensors have been developed to measure many environmental parameters closely related to our daily lives, such as strain, force, torsion, curvature, magnetic field, surrounding refractive index, and so on [ 2 , 3 , 4 ]. Regardless of the type of parameter being measured, the temperature crosstalk limits the practical application of LPFG-based sensors.…”