We report on the observation of spatial optical simultons in a novel geometry consisting of two partially overlapped, linearly uncoupled planarwaveguides in lithium niobate obtained by reverse proton exchange. Two orthogonally polarized modes are coupled through an off-diagonal tensor element of the quadratic nonlinearity, giving rise to second harmonicgeneration and mutual trapping via cascading. This phenomenon demonstrates a balance between diffraction and self-focusing for two orthogonal modes of different waveguides, and occurs at room temperature in longitudinally uniform waveguides.
|Rivista||JOURNAL OF OPTICS|
|Stato di pubblicazione||Published - 2004|
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