title: Transverse modulational instabilities for counterpropagating beams in Kerr media.
abstract: Continuous-wave and oscillatory transverse instabilities are predicted for counterpropagating waves in Kerr media for both focusing and defocusing nonlinearities. Neither a cavity nor a finite response time is required. Computed Gaussian-beam results agree well with analytic plane-wave calculations that straddle Raman-Nath and Bragg regimes.
authors.forename: W J
authors.initials: WJ
authors.lastname: Firth
authors.forename: C
authors.initials: C
authors.lastname: Paré