Optics Letters, 23, 1167-1169 (1998).
The effect of the walk-off in pattern selection in optical parametric oscillators is theoretically examined. We show that a dynamical mechanism allows us to observe the formation of structures also for positive signal detunings. In this regime the generated pattern is a periodic array of kinks that separate regions in which one of two stable steady-states is alternatively selected. This structure can be regarded as a train of dark soliton stripes because the two solutions have opposite signs. The wavelength of the selected pattern is theoretically predicted and the prediction agrees with the results of the numerical solutions of the equations governing the device.
OCIS numbers: 190.4410 (Nonlinear optics, parametric processes), 190.4420 (Nonlinear optics, transverse effects in), 190.4970 (Parametric oscillators and amplifiers), 190.5530 (Pulse propagation and solitons).
postscript
(compressed with gzip)
LaTeX file
Pere Colet e-mail: [email protected] http://www.imedea.uib.es/~pere/