title: Influence of alternating field frequency on enhanced photorefractive gain in two-beam coupling.
abstract: We derive an analytic expression describing the intensity and field frequency dependence of photorefractive gain in two-beam coupling under an alternating square-wave electric field. We determine the frequency and intensity ranges over which the gain is maximum and time independent. Experimental results for Bi(12)GeO(20) crystals are presented.
authors.forename: C
authors.initials: C
authors.lastname: Besson
authors.forename: J M
authors.initials: JM
authors.lastname: Jonathan
authors.forename: A
authors.initials: A
authors.lastname: Villing
authors.forename: G
authors.initials: G
authors.lastname: Pauliat
authors.forename: G
authors.initials: G
authors.lastname: Roosen