Coupling system between dielectric optical guides and planar photonic crystal guides
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United States of America Patent
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Issued Date -
Jul 13, 2006
app pub date -
Aug 13, 2003
filing date -
Aug 14, 2002
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method of optimising signal coupling between a dielectric guide and a photonic crystal guide. The inventive method is based on introducing point defects into a coupling structure that is required to adapt the width between both guides. The number and characteristics of said defects depend on both the characteristics of the coupling structure and the photonic crystal and dielectric guides. By introducing said defects into the aforementioned structure, the coupling is optimised within a wide range of frequencies, thereby enabling optical signals to be introduced into or extracted from any device that is made from photonic crystals without involving a drop in performance owing to inefficient coupling.
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