▎ 摘　　要

NOVELTY - The laser has a main body provided with a tuning device and a current adjusting device. The tuning device is arranged on a resonant optical path. The tuning device is formed with a graphene film. The tuning device is provided with an optical fiber. An end of the optical fiber and an end surface of a fiber core are coated with the graphene film. A current regulator is formed with the graphene film such that current flows through the graphene film is adjusted. The tuning device is provided with two electrodes. The electrodes are arranged with the graphene film. USE - Optical fiber laser. ADVANTAGE - The laser reduces loss of the optical fiber, transmits optical signal through the tuning device so as to ensure better fiber laser tuning effect. DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of an optical fiber laser. '(Drawing includes non-English language text)'