▎ 摘　　要

NOVELTY - The laser has an erbium-doped optical fiber amplifier connected with an optical isolator, a polarization controller, a graphene i.e. single-layer Graphene, and a silicon hybrid waveguide and an optical fiber output coupler. Two ends of the graphene and the silicon hybrid waveguide are provided with a vertical coupling grating part that is connected with an external optical system by a coupling optical fiber. An end of the optical fiber output coupler is connected with a pulse laser output end. Another end of the optical fiber output coupler is connected with an input end of the erbium-doped optical fiber amplifier to form an annular cavity structure. USE - Graphene and silicon hybrid waveguide based passive Q-switched pulse laser. ADVANTAGE - The laser is simple in structure and convenient for monitoring quality of the graphene, and can prevent a graphene saturable absorber from being damages and control saturable absorption parameter of the graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a front view of a graphene and silicon hybrid waveguide based passive Q-switched pulse laser.