▎ 摘　　要

NOVELTY - The utility model claims a pig oil detector based on hollow photonic crystal fibre and graphene quantum dot, comprising a hollow photonic crystal optical fibre, a sample inlet hole, a sample outlet hole, a gold-graphene quantum dot coating, connected with the multimode optical fibre; at the left end of the hollow photonic crystal fiber, using the selective collapse process of the fusion splicer discharge, sealing the air hole of the hollow photonic crystal, preparing the sample inlet hole, then using the femtosecond laser system to punch on the side of the hollow photonic crystal fiber, obtaining the sample outflow hole; finally using fusion splicer to weld the hollow photonic crystal optical fibre and multimode optical fibre, preparing pig oil detector; when the liquid sample containing lard oil flows through the hollow photonic crystal fibre channel and is excited by ultraviolet light irradiation, analyzing the intensity change of the fluorescence signal received by the detector; judging whether the solution sample contains lard oil; The device needs few samples, low cost, high signal-to-noise ratio and flexible use.