Optical fiber laser synthesizer

The invention provides an optical fiber laser synthesizer comprising a laser synthesizing unit, a plurality of laser incidence unit and a carrying device used for carrying the laser synthesizing unitand the laser incidence unit; each laser incidence unit is used for providing a beam of incident laser, an angle of the laser incidence unit is rotatable, the laser synthesizing unit is used for synthesizing a plurality of incident laser beams into one beam which is then output, the laser synthesizing unit comprises a plurality of stacked volume Bragg gratings, the volume Bragg gratings are greater than the laser incidence units in quantity, each volume Bragg grating is used for diffracting one incident laser beam, and diffracted incident laser beams are output in such a way that the diffracted incident laser beams are perpendicular to surfaces of the volume Bragg gratings. The optical fiber laser synthesizer disclosed in the invention is high in diffraction efficiency, power loss of incident laser beams can be pr