We report an experimental study of the breakup through modulational instability of broad fundamental beams near the phase-matching condition for second-harmonic generation in lithium niobate slab waveguides. Two mechanisms for initiating modulational instability, waveguide imperfections and noise on the input beam, are identified.
© 2000 Optical Society of America
(190.0190) Nonlinear optics : Nonlinear optics
H. Fang, R. Malendevich, R. Schiek, and G. I. Stegeman, "Spatial modulational instability in one-dimensional lithium niobate slab waveguides," Opt. Lett. 25, 1786-1788 (2000)