Phase-conjugation suppression of the phase noise during propagation of giant laser pulses in an optical fiber

An experimental study was made of the suppression of phase noise during propagation of giant ruby laser pulses in short (up to 0.1 m) multimode fiber waveguides. A segment of a fiber waveguide, in which stimulated Brillouin scattering took place, acted as a mirror performing phase conjugation. The dependences of the parameters of the corrected signal on the lengths of both waveguide segments were determined.