Fiber optic coupler array
First Claim
1. An assembly comprising:
- a plurality of optical fiber waveguides each having a waveguide core;
a photonic integrated circuit that includes a plurality of in-plane waveguide structures corresponding to said plurality of optical fiber waveguides; and
a substrate that is bonded to said photonic integrated circuit, wherein said substrate includes a plurality of grooves that support said plurality of optical fiber waveguides;
wherein portions of said plurality of optical fiber waveguides that are supported by said grooves of said substrate define a corresponding plurality of flat surfaces that are spaced radially from the waveguide cores of said plurality of optical fiber waveguides and that extend parallel to the waveguide cores along the lengthwise dimension of the optical fiber waveguides; and
wherein said photonic integrated circuit includes a plurality of passive waveguide structures that correspond to both said plurality of in-plane waveguide structures of said photonic integrated circuit and said plurality of optical fiber waveguides, each passive waveguide structure including a first coupling section that interfaces to the flat surface of the corresponding optical fiber waveguide and a second coupling section that interfaces to the corresponding in-plane waveguide structure of said photonic integrated circuit, wherein said first coupling section is configured to provide for evanescent coupling of optical signals into or from the corresponding optical fiber waveguide, and the second coupling section is configured to provide for adiabatic spot-size conversion of optical signals between the first coupling section and the corresponding in-plane waveguide structure of said photonic integrated circuit.
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0 Petitions
Accused Products
Abstract
An assembly includes optical fibers each having a waveguide core, a photonic integrated circuit (IC) that includes in-plane waveguides corresponding to the optical fibers, and a substrate bonded to the photonic IC with grooves that support the optical fibers. The substrate and photonic IC can have metal bumps that cooperate to provide mechanical bonding and electrical connections between the substrate and photonic IC. Portions of the optical fibers supported by the substrate grooves can define flat surfaces spaced from the optical fiber cores. The photonic IC can include passive waveguide structures with a first coupling section that interfaces to the flat surface of a corresponding optical fiber (for evanescent coupling of optical signals) and a second coupling section that interfaces to a corresponding in-plane waveguide (for adiabatic spot-size conversion of optical signals).
41 Citations
15 Claims
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1. An assembly comprising:
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a plurality of optical fiber waveguides each having a waveguide core; a photonic integrated circuit that includes a plurality of in-plane waveguide structures corresponding to said plurality of optical fiber waveguides; and a substrate that is bonded to said photonic integrated circuit, wherein said substrate includes a plurality of grooves that support said plurality of optical fiber waveguides; wherein portions of said plurality of optical fiber waveguides that are supported by said grooves of said substrate define a corresponding plurality of flat surfaces that are spaced radially from the waveguide cores of said plurality of optical fiber waveguides and that extend parallel to the waveguide cores along the lengthwise dimension of the optical fiber waveguides; and wherein said photonic integrated circuit includes a plurality of passive waveguide structures that correspond to both said plurality of in-plane waveguide structures of said photonic integrated circuit and said plurality of optical fiber waveguides, each passive waveguide structure including a first coupling section that interfaces to the flat surface of the corresponding optical fiber waveguide and a second coupling section that interfaces to the corresponding in-plane waveguide structure of said photonic integrated circuit, wherein said first coupling section is configured to provide for evanescent coupling of optical signals into or from the corresponding optical fiber waveguide, and the second coupling section is configured to provide for adiabatic spot-size conversion of optical signals between the first coupling section and the corresponding in-plane waveguide structure of said photonic integrated circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification