METHOD AND SYSTEM FOR MULTIPLEXER WAVEGUIDE COUPLING
First Claim
1. An optical device for all-optically multiplexing or demultiplexing light of substantially different predetermined wavelengths, the optical device comprising:
- at least one first dielectric waveguide formed on a substrate;
at least one second dielectric waveguide formed on said substrate, said at least one first dielectric waveguide and said at least one second dielectric waveguide intersecting at an intersection; and
a diffraction grating structure formed at said intersection, wherein said diffraction grating structure is adapted for diffracting light of a first predetermined wavelength from said at least one first dielectric waveguide in a coupling direction, and for diffracting light of a second predetermined wavelength from said at least one second dielectric waveguide in substantially the same coupling direction which is substantially different from the normal direction on the average plane defined by the grating structure, the first predetermined wavelength and the second predetermined wavelength being substantially different.
1 Assignment
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Accused Products
Abstract
An optical device for optically multiplexing or demultiplexing light of different predetermined wavelengths is provided, the optical device comprising at least one first waveguide (11) and at least one second waveguide (12) formed on a substrate (10), wherein the at least one first waveguide and the at least one second waveguide intersect at an intersection, comprising a diffraction grating structure (13) formed at the intersection. There exists a first wavelength or wavelength band travelling within the first waveguide (11) exciting the grating structure and being diffracted an angle corresponding to an outcoupling direction and there exists a second wavelength or wavelength band, different from the first wavelength or wavelength band, travelling within the second waveguide (12) exciting the grating structure and being diffracted at an angle corresponding to the same outcoupling direction. The two radiation beams comprising radiation of two different wavelengths or wavelength bands are spatially separated into the optical waveguides (11 and 12) or combined into single outcoupling direction, e.g. into a single optical element, e.g. a single optical fiber (21). An optical device may be used in local access communications such as fiber to the home, office or curb applications.
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Citations
31 Claims
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1. An optical device for all-optically multiplexing or demultiplexing light of substantially different predetermined wavelengths, the optical device comprising:
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at least one first dielectric waveguide formed on a substrate; at least one second dielectric waveguide formed on said substrate, said at least one first dielectric waveguide and said at least one second dielectric waveguide intersecting at an intersection; and a diffraction grating structure formed at said intersection, wherein said diffraction grating structure is adapted for diffracting light of a first predetermined wavelength from said at least one first dielectric waveguide in a coupling direction, and for diffracting light of a second predetermined wavelength from said at least one second dielectric waveguide in substantially the same coupling direction which is substantially different from the normal direction on the average plane defined by the grating structure, the first predetermined wavelength and the second predetermined wavelength being substantially different. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 30, 31)
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18. A method for designing an optical device for optically multiplexing or demultiplexing light of substantially different predetermined wavelengths, the method comprising:
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determining a direction at which light of a first predetermined wavelength is diffracted from a first dielectric waveguide by a diffraction grating, for a range of diffraction gratings having different grating structures; determining a direction at which light of a second predetermined wavelength is diffracted from a second dielectric waveguide by said diffraction grating, for said range of diffraction gratings having different diffraction grating structures, the second predetermined wavelength being substantially different from the first predetermined wavelength; and selecting a grating structure for which the diffraction of light of said first predetermined wavelength from said first dielectric waveguide occurs in a coupling direction and diffraction of light of said second predetermined wavelength from said second dielectric waveguide occurs in substantially the same coupling direction which is substantially different from the normal direction on the average plane defined by the grating structure. - View Dependent Claims (19, 20, 21, 22)
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23. A method for optical multiplexing or demultiplexing, the method comprising:
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providing at least one first dielectric waveguide on a substrate; providing at least one second dielectric waveguide on said substrate, said at least one first dielectric waveguide and said at least one second dielectric waveguide intersecting at an intersection; providing a diffraction grating structure at said intersection; diffracting light of a first predetermined wavelength at said diffraction grating structure; and diffracting light of a second predetermined wavelength at said diffraction grating structure, the second predetermined wavelength being substantially different from the first predetermined wavelength, wherein said diffraction grating structure is adapted for diffracting light of said first predetermined wavelength from said at least one first dielectric waveguide in a coupling direction, and diffracting light of said second predetermined wavelength from said at least one second dielectric waveguide in the same coupling direction which is substantially different from the normal direction to the average plane defined by the grating structure. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification