▎ 摘　　要

NOVELTY - The utility model model claims a temperature sensor based on oxide graphene coated micro-nano optical fibre coupler, relating to the technical field of optical fibre sensor, specifically to a temperature sensor based on oxidized graphene coated micro-nano optical fibre coupler. The utility model model is used for improving the existing temperature sensing device in the process of high cost, easy to be interfered by the outside, low sensitivity and so on. The utility model comprises a broadband light source, a single-mode optical fibre, a sensing unit and a spectrometer. wherein the sensing unit comprises a multi-mode micro-nano optical fibre coupler and a graphene oxide coating layer; The multimode micro-nano fibre coupler comprises two ports. The utility model finally analyzes the interference spectrum phase change of the optical signal by the spectrometer, so as to realize the temperature sensing.