Abstract
A low crosstalk and wideband photonic crystal (PC) waveguide intersection
design based on two orthogonal hybrid waveguides in a crossbar configuration
is proposed. The finite-difference time-domain (FDTD) and coupled-mode theory
(CMT) methods are used to simulate the hybrid waveguides of square lattice.
The bandwidth (BW) and crosstalk of the intersection are investigated for
various radii of the coupled cavities. It is shown that simultaneous crossing
of the lightwave signals through the intersection with negligible interference
is possible. The transmission of a 200-fs pulse at 1550 nm is simulated by
using the FDTD method, and the transmitted pulse shows negligible crosstalk
and very little distortion.
© 2009 IEEE
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