Tapered rib waveguide
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United States of America Patent
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Aug 22, 2000
Grant Date -
N/A
app pub date -
Feb 6, 1998
filing date -
Feb 7, 1997
priority date (Note) -
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Abstract
A tapered rib waveguide tapering from a large, multi-mode optical waveguide to a smaller, single-mode optical waveguide, the tapered rib waveguide comprising two portions (4,5) formed of the same material: a lower portion (4) which tapers laterally from the large waveguide to the smaller waveguide and an upper portion (5) formed on the lower portion (4), which tapers to a point (or other form of termination), the dimensions of the two portions (4,5) being such that substantially all of a fundamental mode propagated in the large multi-mode waveguide is coupled to the smaller, single-mode waveguide.
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