Numerical and experimental studies of dispersion characteristics of tapered fiber Bragg gratings under the influence of axial strain

In this work, numerical model of tapered fiber Bragg grating (TFBG) based on transfer matrix method (TMM) and coupled mode theory (CMT) is presented. It describes the behavior of TFBG when the axial strain is applied. In particular, the influence of various tensile forces on dispersion characteristics of tapered fiber Bragg gratings as fiber optic components with variable group delay were examined. Besides the numerical results, measured group delay characteristics are presented as well and compared with theoretical ones.