Pattern Formation in Non-Linear Optics

 Ana Jofre

Transverse spatial structures comprised of patterns such as hexagons,
rings, and stripes are frequently observed in laser beams traversing
nonlinear optical media.  Three typical systems in which such pattern
formation occurs are a Fabry-Perot Cavity containing a non-linear
medium, a non-linear medium interacting with counterpropagating beams,
and a thin non-linear medium with a single feedback mirror.  The
observed pattern depends on the polarization of the beam, the
non-linear medium, and parameters of the experimental set-up such as
the distance between the feedback mirror and the non-linear medium.  An
overview of the mechanism involved leading to pattern formation and the
corresponding experimental observations will be presented.

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