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David Dobson
Optimal mode coupling in simple planar waveguides
Abstract:
Despite recent advances in photonic crystal waveguides,
conventional dielectric channel and strip waveguides are
still the primary devices for localizing and moving optical
signals in chip-level integrated photonic structures.
These waveguides are typically low-loss and relatively easy
to fabricate. A fundamental engineering problem associated
with these structures is how to couple energy into and out of
the waveguide, particularly for "single mode" structures where
the cross section of the waveguide is generally smaller than
the free space wavelength of the incoming signal. In this
talk we propose an approach for designing efficient waveguide
couplers by formulating and numerically solving an associated
mathematical optimization problem.
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