Abstract
Weak modulation of a quasi-phase-matching (QPM) grating opens possibilities
for engineering both the average quadratic nonlinearity and the incoherent
average cubic nonlinearity induced by QPM. The relative strength of the
average quadratic and effective (intrinsic plus induced) cubic nonlinearity
is studied for . We show how the induced average cubic nonlinearity can be engineered
to dominate the intrinsic material cubic nonlinearity and how doing so will
allow the intensity at which the quadratic and cubic nonlinearities balance
and thus compete to be decreased to a few gigawatts per square centimeter.
© 1999 Optical Society of America
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Equations (9)
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