Transverse instabilities are shown to accompany counterpropagation of optical beams through reflection gratings in Kerr media. The instability threshold of continuous waves is analytically derived, and it is shown that the presence of the grating broadens and narrows the stability region of plane waves in focusing and defocusing media, respectively. Furthermore, counterpropagating soliton stability is numerically investigated and compared with the transverse modulation instability analysis, revealing an underlying physical link.
© 2006 Optical Society of America
Original Manuscript: May 31, 2006
Revised Manuscript: July 11, 2006
Manuscript Accepted: July 15, 2006
Published: September 11, 2006
Carlo Rizza, Alessandro Ciattoni, Eugenio DelRe, and Elia Palange, "Transverse and soliton instabilities due to counterpropagation through a reflection grating in Kerr media," Opt. Lett. 31, 2900-2902 (2006)