title: Mirrorless coherent oscillation due to six-beam vectorial mixing in photorefractive crystals.
abstract: A cw mirrorless oscillation is observed in a photorefractive LiNbO(3):Cu crystal when the crystal is exposed to two nearly counterpropagating pump waves from an Ar(+) laser. This oscillation is shown to result from a parametric vectorial six-beam interaction in a medium with a photovoltaic nonlinearity.
authors.forename: A
authors.initials: A
authors.lastname: Novikov
authors.forename: V
authors.initials: V
authors.lastname: Obukhovski
authors.forename: S
authors.initials: S
authors.lastname: Odoulov
authors.forename: B
authors.initials: B
authors.lastname: Sturman