Electromagnetic mode conversion in photonic crystal multimode waveguides
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United States of America Patent
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Apr 27, 2004
Grant Date -
Oct 2, 2003
app pub date -
Mar 21, 2003
filing date -
Jan 31, 2001
priority date (Note) -
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Abstract
A photonic crystal waveguide having multiple guided modes, the waveguide comprising: a dielectric confinement region surrounding a waveguide axis, the confinement region comprising a photonic crystal having at least one photonic band gap, during operation the confinement region guides EM radiation in a first range of frequencies to propagate along the waveguide axis; a dielectric core region extending along the waveguide axis and surrounded by the confinement region about the waveguide axis; and a mode coupling segment comprising at least one bend in the waveguide axis, wherein during operation the mode coupling segment converts EM energy in a first guided mode to a second guided mode with a conversion efficiency greater than 10% for a frequency in the first range of frequencies.
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