Dual “cheese wedge” silicon taper waveguide
First Claim
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1. An apparatus, comprising:
- a lower waveguide having a first end tapering down over length (L) to a narrower second end;
a first generally wedge shaped waveguide atop the lower waveguide; and
a second generally wedge shaped waveguide atop the first generally wedge shaped waveguide.
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Abstract
An optical device may include a fiber or waveguide that is intended to be coupled to another waveguide having a significantly larger/smaller cross-sectional size. As such, two wedge shaped waveguides may be positioned atop a tapered waveguide. The dual wedge design may allow for shorter taper lengths and smaller final waveguide cross section dimensions.
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Citations
20 Claims
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1. An apparatus, comprising:
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a lower waveguide having a first end tapering down over length (L) to a narrower second end; a first generally wedge shaped waveguide atop the lower waveguide; and a second generally wedge shaped waveguide atop the first generally wedge shaped waveguide. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A tapered waveguide device, comprising:
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a silicon-on-insulator substrate (SOI); a lower waveguide on the SOI substrate having a wider end tapering down to a narrower end; a first wedge shaped waveguide atop the lower waveguide; and a second wedge shaped waveguide atop the first wedge shaped waveguide, wherein the wider end of the lower waveguide and base ends of the first and second wedge shaped waveguides form an input/output facet. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method comprising:
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inputting a beam into a waveguide facet; squeezing an optical mode of the beam from a top wedge into a lower wedge; squeezing the optical mode of the beam from the lower wedge into a tapered waveguide; and coupling the beam from the tapered waveguide to a rib. - View Dependent Claims (15, 16)
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17. A system, comprising:
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a dual wedge waveguide comprising; a lower waveguide having a first end tapering down over length (L) to a narrower second end, the narrower end to connect to an optical circuit; a first generally wedge shaped waveguide atop the lower waveguide; and a second generally wedge shaped waveguide atop the first generally wedge shaped waveguide; an optical signal source; and an optical fiber to connect between the dual wedge waveguide and the optical signal source. - View Dependent Claims (18, 19, 20)
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Specification