Single wavelength semiconductor laser with grating-assisted dielectric waveguide coupler
AssigneeTexas Instruments Incorporated
InventorsJerome K. Butler, Lily Y. Pang, Gary A. Evans
Life of this patent
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Abstract
A grating (18) couples the waveguide region (36) of a semiconductor laser (11) to a dielectric waveguide (26). The waveguide region of the laser includes a mirror (15) at one end thereof and an absorber (19) at the other end thereof. The dielectric waveguide includes a reflector (24) therein to reflect a portion of the light coupled from the laser to the dielectric waveguide back into the laser waveguide region.
Claims18
A method of emitting monochromatic light from an integrated circuit, the method comprising generating light in an active region of a semiconductor laser, the laser having a semiconductor waveguide;
- transmitting the light through the semiconductor waveguide;
- further transmitting a portion of the light having a first wavelength through a monochromatic grating and into an adjacent dielectric waveguide;
- reflecting a first part of the light having the first wavelength
- back through the monochromatic grating,
- into the semiconductor waveguide, and
- into the active region of the semiconductor laser;
- and
- transmitting a second part of the light having the first wavelength through an external interface of the dielectric waveguide.
A microelectronic circuit comprising:
- a semiconductor laser;
- a dielectric waveguide coupled to the semiconductor laser by a grating;
- the dielectric waveguide having an external transmission interface;
- and
- a partial reflector in the dielectric waveguide to feed back light from the dielectric waveguide to the semiconductor laser;
- the partial reflector disposed near the external transmission interface.
Dependencies are inferred from the claim text.