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.
© 1988 Optical Society of America
Original Manuscript: June 27, 1988
Manuscript Accepted: August 22, 1988
Published: December 1, 1988
W. J. Firth and C. Paré, "Transverse modulational instabilities for counterpropagating beams in Kerr media," Opt. Lett. 13, 1096-1098 (1988)