▎ 摘　　要

NOVELTY - The utility model claims a micro-nano optical fiber structure for oxide graphene-temperature sensing device, comprising a broadband light source, an isolator set in turn along the direction of the output light, a first single-mode optical fiber, cone-shaped multimode optical fiber covered by oxide graphene cladding, a second single-mode optical fiber, a spectrometer. The utility model oxidation graphene has large specific surface area and rich in functional group, high electron transfer rate, can realize high-sensitivity temperature sensor in the optical fiber temperature sensing system. relative to the other types of temperature sensor, this utility model adopts the optical fiber temperature sensing device at-micro-nano optical fiber structure of the graphene oxide, has high sensitivity, easy preparation, simple operation and so on.