▎ 摘　　要

NOVELTY - A graphene-based surface plasmon resonance long-period fiber grating sensor comprises input fiber, long-period fiber grating probe and output fiber, where the input fiber is connected to one end of the long-period fiber grating probe, and the other end of the long-period grating probe is connected to the output fiber, and the side of the gate of the long-period fiber grating probe with graphene layer having thickness of 3-30 nm, light enters the long-period fiber grating probe through the input fiber, and the surface plasmon resonance phenomenon is generated by the graphene layer on the side of the excitation gate region. USE - Graphene-based surface plasmon resonance long-period fiber grating sensor for use in sensing system for measuring concentration of sample (claimed). ADVANTAGE - The graphene-based surface plasmon resonance long-period fiber grating sensor has high measurement accuracy and sensitivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a sensing system for measuring concentration of the sample.