▎ 摘　　要

NOVELTY - The laser has reflection optical fiber bragg grating column, Raman optical fiber, a fiber bragg grating structure, a graphene passive switch and a step portion that are connected with each other. The stokes of the step portion are respectively provided with an optical fiber bragg grating structure and a pumping source. The output of the pumping source structure is respectively provided with Raman pulse laser. A graphene passive switch is inserted in an optical fiber bragg grating structure. USE - Modulating Raman fiber laser. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of modulating Raman fiber laser.