▎ 摘　　要

NOVELTY - The utility model claims an improved micro-ring resonant filter based on graphene, comprising a substrate, two ends of one side surface of the substrate are respectively provided with an input straight waveguide and an output straight waveguide; the output straight waveguide and the input straight waveguide are in parallel state, the middle part of the output straight waveguide and the input straight waveguide is provided with three micro-ring resonant cavities; the outer part of the micro-ring resonant cavity is sleeved with a graphene ring; the micro-ring resonant cavity is equidistantly distributed on the surface of the substrate; a first coupling area is formed between the micro-ring resonant cavity close to the input straight waveguide and the input straight waveguide, a second coupling region is formed between the micro-ring resonant cavity close to the output straight waveguide and the output straight waveguide; a third coupling region is formed between the adjacent micro-ring resonant cavities. In the process of using the utility model, the energy loss of the signal capable of reducing the specific wavelength by improving the micro-ring resonant filter energy transfer, and the 3dB bandwidth of the obtained filter spectral line becomes narrower, which is good for popularization and use.