title: Double phase-conjugate mirror using a photorefractive Bi(12)TiO(20) crystal.
abstract: Experimental results are reported for four-wave mixing at 633 nm with a photorefractive Bi(12)TiO(20) crystal in a double phase-conjugate mirror geometry. Recording in the presence of an alternating electric field with optimum focusing of interacting Gaussian beams yields up to 40% diffraction efficiency for the hologram.
authors.forename: M P
authors.initials: MP
authors.lastname: Petrov
authors.forename: S L
authors.initials: SL
authors.lastname: Sochava
authors.forename: S I
authors.initials: SI
authors.lastname: Stepanov