▎ 摘　　要

NOVELTY - The device has a main body provided with a quartz glass sleeve pipe, a single mode optical fiber, a graded multimode optical fiber and a graphene film layer. The single-mode optical fiber is connected with the graded multimode optical fiber that is inserted into the quartz glass sleeve pipe. An end of the quartz glass sleeve pipe is formed with the graphene film layer. Another end of the of the quartz glass sleeve pipe is inserted into the single mode optical fiber. Length of the graded multimode optical fiber is about 1200-1300 microns. Thickness of the graphene film layer is about 1-10 nm. USE - Optical fiber Fabry-Perot ultrasonic probe device for use in a medical field and a biomedical field. ADVANTAGE - The graded multimode optical fiber emits emergent beam so as to improve reflecting light receiving rate of the graphene film such that the graphene film layer is doped with metal, thus improving light reflectivity and reflectivity of the graphene film to achieve high sensitivity of the sound wave signal detection. The device is simple in structure, and has less volume, high sensitivity, strong electromagnetic interference resistance effect and high protection efficiency. DETAILED DESCRIPTION - The graphene film layer is a metal doped graphene film layer. An INDEPENDENT CLAIM is also included for an optical fiber Fabry-Perot ultrasonic probe device manufacturing method. DESCRIPTION OF DRAWING(S) - The drawing shows a side sectional view of an optical fiber fabry-perot ultrasonic probe device.