Optical waveguide coupler, sub-assembled optical unit, optical module and optically coupling method
AssigneeNEC Corporation
InventorShinya Watanabe
Life of this patent
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Abstract
An optical waveguide coupler for optically coupling an optical waveguide and an optical component having mutually different spot sizes, includes (1) a first spot size converting part, placed on the optical waveguide side, that converts a spot size with higher efficiency for an optical signal of a long wavelength band than for an optical signal of a short wavelength band, and (2) a second spot size converting part, placed on the optical component side, that converts a spot size with higher efficiency for the optical signal of the short wavelength band than for the optical signal of the long wavelength band.
Claims41
An optical waveguide coupler for optically coupling an optical waveguide and an optical component having mutually different spot sizes, comprising:
- a first spot size converting part, placed on the optical waveguide side, that converts a spot size with higher efficiency for an optical signal of a long wavelength band than for an optical signal of a short wavelength band;
- and
- a second spot size converting part, placed on the optical component side, that converts a spot size with higher efficiency for the optical signal of the short wavelength band than for the optical signal of the long wavelength band.
An optical waveguide coupler for optically coupling a waveguide and an optical component having mutually different spot sizes, comprising:
- first spot size converting means placed on the optical waveguide side and converting a spot size with higher efficiency for an optical signal of a long wavelength band than for an optical signal of a short wavelength band;
- and
- second spot size converting means placed on the optical component side and converting a spot size with higher efficiency for the optical signal of the short wavelength band than for the optical signal of the long wavelength band.
An optical coupling method of optically coupling a waveguide and an optical component having mutually different spot sizes, the method comprising:
- converting a spot size of an optical signal of a long wavelength band into a larger size than that of an optical signal of a short wavelength band by a first spot size converting part placed on the waveguide side, and
- converting a spot size of the optical signal of the short wavelength band into a larger size than that of the optical signal of the long wavelength band by a second spot size converting part placed on the optical component side.
An optical coupling system for optically coupling a waveguide and an optical component having mutually different spot sizes, the system comprising:
- means for converting a spot size of a optical signal of a long wavelength band into a larger size than that of an optical signal of a short wavelength band, and
- means for converting a spot size of the optical signal of the short wavelength band into a larger size than that of the optical signal of the long wavelength band.
Dependencies are inferred from the claim text.