A dual-FBG and F-P cavity compound optical fiber sensor based on a multi-core fiber (MCF) is proposed. A hollow core fiber (HCF) was fused between a single-mode fiber (SMF) and a MCF to form the F-…
Thermal diffusion is the phenomenon of the migration of dopants in an optical fiber during high-temperature treatment. Research on the theory and technique of optical fiber thermal diffusion shows …