It is often desirable to remove both wave front and polarization aberrations from an optical beam. Scalar phase conjugation, such as ordinary stimulated Brillouin scattering, can correct only for wave-front aberrations. We have developed a new geometry for Brillouin-enhanced four-wave mixing that performs vector phase conjugation to correct for both wave-front and polarization distortions. Results show a reduction in the depolarization losses from 50% to less than 2% of the total output energy. Coherent, variable, multiple-beam combination is achieved without need of nonreciprocal devices such as Faraday rotators.
© 1997 Optical Society of America
Mark W. Bowers, Robert W. Boyd, and Allen K. Hankla, "Brillouin-enhanced four-wave-mixing vector phase-conjugate mirror with beam-combining capability," Opt. Lett. 22, 360-362 (1997)