Spectral response and sensitivity of tilted fiber Bragg gratings (TFBG) under low-temperature and strain conditions

Abstract In this study, we advance our understanding of dual parameter sensing in TFBGs through detailed modelling and highlight the ongoing and future directions for improving sensor design. The TFBGs structures of strain and low temperature measurement are thoroughly analysed in this study. The TFBGs structures with tilt angles of 4°, 8°, 12°and 16° were modelled analytically by Coupled Mode Theory (CMT) and the Transfer Matrix Method (TMM), taking into consideration applied strain levels with