▎ 摘　　要

NOVELTY - The device has a photonic crystal fiber (10) which is provided with a first groove (11) and a second groove (12) opposite to each other along a direction parallel to the axial direction. The metal film (20), the metal micro-nano structure layer (30) and the graphene layer (40) are arranged in the first groove. The metal film is arranged close to the axis of the photonic crystal fiber. The metal micro-nano structure layer includes multiple metal micro-nano structure units. The metal micro-nano structure units are arranged on a side of the metal film away from the photonic crystal fiber. The graphene layer is arranged on a side of the metal micro-nano structure layer away from the metal film. USE - Photonic crystal fiber-based chirality detection device for use in photonic crystal fiber-based chiral detection system (claimed). ADVANTAGE - The device reduces total reflection energy between the fiber core and the metal film of the photonic crystal fiber so as to change an optical signal through the photonic crystal fiber, so that spectral intensity of an emergent light signal of the photonic crystal fiber can be detected, thus obtaining to-be-measured chiral of the circularly polarized light. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the photonic crystal fiber-based chirality detection device. Photonic crystal fiber (10) Grooves (11,12) Metal film (20) Metal micro-nano structure layers (30,80) Graphene layer (40)