Planar optical waveguides with planar optical elements
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United States of America Patent
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Mar 18, 1997
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N/A
app pub date -
Feb 13, 1995
filing date -
Feb 24, 1992
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Abstract
A planar optical waveguide comprises a substrate 1, a waveguide core layer 2, at least one planar optical element, wherein said planar optical element comprises at least one optically functional interface 3 which is adjacent to a cavity 4, and an overclad layer 5. The cavity enhances the optical characteristics of the planar optical element because of the substantial difference in the refractive index of the cavity as compared to the refractive index of said waveguide core layer.
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