Optical wavelength multiplexing and demultiplexing device for multiplexing or demultiplexing light having a plurality of modes and photodetector using the same
AssigneeCanon Kabushiki Kaisha
InventorShinsuke Takeuchi
Life of this patent
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Abstract
An optical wavelength multiplexing and demultiplexing device includes a first waveguide and a plurality of waveguides having different propagation constants. The first waveguide is caused to be coupled with the plurality of waveguides in different modes. The plurality of waveguides have different structures or different indices so as to provide different propagation constant from each another. According to the optical wavelength multiplexing and demultiplexing device, light components having various wavelengths and modes can be simultaneously multiplexed or demultiplexed.
Claims35
An optical wavelength multiplexing and demultiplexing device for multiplexing or demultiplexing light in light propagation through waveguides, comprising:
- a first waveguide;
- a plurality of waveguides having different propagation constants, said plurality of waveguides comprising at least second and third waveguides, and a first coupling plane defined by central axes of said first and second waveguides being different from a second coupling plane defined by central axes of said first and third waveguides;
- and
- coupling means for coupling said first waveguide and said plurality of waveguides in different modes.
A photodetector for demultiplexing and detecting light of a specific mode from light obtained by multiplexing light components of a plurality of modes, comprising:
- a first waveguide into which multiplexed light is input;
- a plurality of waveguides having different propagation constants, said plurality of waveguides comprising at least second and third waveguides, and a first coupling plane defined by central axes of said first and second waveguides being different from a second coupling plane defined by central axes of said first and third waveguides;
- coupling means for coupling said first waveguide and said plurality of waveguides in different modes;
- and
- detecting means for detecting light demultiplexed by said coupling means.
Dependencies are inferred from the claim text.