title: Parametric amplification of a coherent light wave in photorefractive BaTiO(3) by a single pump beam.
abstract: We demonstrate a new method of light amplification based on forward four-wave mixing in photorefractive BaTiO(3). A single pump beam of combined (ordinary and extraordinary) polarization can be used for an efficient cw amplification of a signal wave with slightly shifted temporal frequency. A signal wave with an initial power of less than 1 nW is amplified ~100 times in a 3.2-mm-thick sample.
authors.forename: J
authors.initials: J
authors.lastname: Neumann
authors.forename: S
authors.initials: S
authors.lastname: Odoulov