Patent ID: 7436581

Claim:
An apparatus for self-phase control in an amplifier having a stimulated Brillouin scattering phase conjugate mirror, comprising: a laser beam generator for providing a laser beam to the amplifier; a plurality of phase conjugate mirror optical amplifiers for amplifying the laser beam; and a plurality of light interrupters that are respectively paired with the optical amplifiers and interrupt beams amplified by the optical amplifiers and reflected to the laser beam generator; wherein the optical amplifiers and the light interrupter split the laser beam into at least two beams and amplify or interrupt the beams, each of the optical amplifiers and light interrupter comprises: a beam splitter for splitting a laser beam into at least two laser beams; stimulated Brillouin scattering phase conjugate mirrors for reflecting the laser beams input from the beam splitter in a direction opposite to the direction of laser beams that are input according to stimulated Brillouin scattering; reflectors that are respectively located behind the phase conjugate mirrors and input beams that have passed through the phase conjugate mirrors to the phase conjugate mirrors again; and fine drivers for finely driving the reflectors, respectively, and the fine drivers are configured to control respective distances between the reflectors and phase conjugate mirrors so as to control positions at which stimulated Brillouin scattering occurs in the phase conjugate mirrors, thereby making a phase difference between laser beams reflected by the scattering “0”.