Perfluorinated polymer optical fiber for precision strain sensing based on novel SMS fiber structure

This paper presents an experimental investigation of a novel strain sensor based on a single-mode-multimode-single-mode (SMS) fiber structure using perfluorinated graded index polymer optical fiber as the multimode fiber section. The experimental results showed that the strain sensitivity is as high as 101 pm/με, which is 16 times higher than those obtained in silica multimode fiber based on SMS fiber structure.