We show that nonlinear optical cavities under periodic modulations can exhibit dissipative Bloch waves. This can be achieved by a proper choice of the incident field in the cavity that must both compensate for losses and match with the modulation period. Dissipative Bloch waves, unlike their conservative counterparts, spontaneously emerge in the cavity and hence correspond to attracting solutions. This makes it possible to experimentally visualize the band structure of the cavity medium. As an illustration of this phenomenon, we performed our analytical investigations on a degenerate optical parametric oscillator with a modulated transverse refractive index.
© 2009 Optical Society of America
Original Manuscript: July 13, 2009
Revised Manuscript: October 1, 2009
Manuscript Accepted: October 2, 2009
Published: October 29, 2009
V. A. Brazhnyi, V. V. Konotop, and M. Taki, "Dissipative optical Bloch waves," Opt. Lett. 34, 3388-3390 (2009)