▎ 摘　　要

NOVELTY - The sensor has an optical fiber cladding by polishing a side-polishing area. A prepared gold nanowire is connected with a probe that is fixed in a side-polishing surface. A layer of graphene is coated on a surface of the gold nanowire. Radius of a photonic crystal fiber core is about 5 um. Radius of an air hole is about 0.36 um. Radius of the gold nanowire is about 0.2 um. Low refractive index of a medium is measured. Two-dimensional sensitivity graphene material is coated on the gold nanowire surface for detecting near infrared wave band low refractive index. USE - Low refractive index-based probe type near infrared graphene photonic crystal fiber (PCF) sensor. ADVANTAGE - The sensor has simple structure and technique, occupied less volume, high sensitivity and better sensing characteristic. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of a low refractive index-based probe type near infrared graphene PCF sensor.