Low-loss photonic crystal waveguide having large core radius
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United States of America Patent
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Jul 4, 2006
Grant Date -
Jan 22, 2004
app pub date -
Jul 16, 2003
filing date -
Jan 25, 2001
priority date (Note) -
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Abstract
An optical waveguide including: a dielectric core region extending along a waveguide axis; and a dielectric confinement region surrounding the core about the waveguide axis, the confinement region comprising a photonic crystal structure having a photonic band gap, wherein during operation the confinement region guides EM radiation in at least a first range of frequencies to propagate along the waveguide axis, wherein the core has an average refractive index smaller than about 1.3 for a frequency in the first range of frequencies, and wherein the core a diameter in a range between about 4.lamda. and 80.lamda., wherein .lamda. is a wavelength corresponding to a central frequency in the first frequency range.
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