▎ 摘　　要

NOVELTY - The device has a thin film coated with a graphene layer (12) of a reflector (13). The reflector is reflected on first dichroic mirror (10). The first dichroic mirror is provided with second dichroic mirror (14). The second dichroic mirror is provided with a pulse output terminal (15). Four plano-convex lenses (11) are connected with the reflector. The first dichroic mirror is attached with a light generation line. The second dichroic mirror is attached with a light path. The light generation line and the light path are fixed in a parallel route. USE - Graphene based mid-infrared dual wavelength fiber lasers pulse repetition frequency determining device. ADVANTAGE - The device is simple in structure, smaller in volume and easy to operate and integrate, and reduces energy consumption. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene based mid-infrared dual wavelength fiber lasers pulse repetition frequency determining method. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a graphene based mid-infrared dual wavelength fiber lasers pulse repetition frequency determining device. Dichroic mirrors (10, 14) Plano-convex lenses (11) Graphene layer (12) Reflector (13) Pulse output terminal (15)