title: Phase conjugation in Cr(4+):YAG at 1.06 microm.
abstract: Phase conjugation in a Cr(4+):YAG saturable absorber by degenerate four-wave mixing with nanosecond pulses at lambda = 1.06 mu m is demonstrated for the first time to our knowledge. An experimental phase-conjugate energy ref lectivity of ~2% and an overall eff iciency of ~0.4% are achieved. Because of the presence of absorbing dipoles oriented along specif ic directions, it is shown that the phase-conjugated beam can be made orthogonally polarized relative to the signal beam or to both pump beams with almost no reduction of the energy reflectivity.
authors.forename: A
authors.initials: A
authors.lastname: Brignon
authors.forename: J P
authors.initials: JP
authors.lastname: Huignard