Brillouin frequency shift dependences on strain and temperature in perfluorinated polymer optical fibers with unique core dopants

Abstract Optical fiber sensors based on Brillouin scattering have attracted extensive attention due to their ability to perform distributed strain and temperature measurements. In this study, we explore the Brillouin frequency shift (BFS) characteristics in perfluorinated graded-index polymer optical fibers (POFs) doped with unique materials, focusing on the BFS dependencies on strain and temperature. Our results reveal a strain sensitivity coefficient of –195 MHz/%, which is approximately 1.6 times higher in absolute value than previously reported for other POFs, while the temperature sensitivity (–3.1 MHz K −1 ) remains comparable to previous findings.