Semiconductor laser apparatus with curved waveguide
AssigneeHitachi, Ltd.
InventorsShin'ichi Nakatsuka, Kenji Uchida, Shinichirou Yano
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Abstract
A semiconductor laser apparatus having an optical waveguide made of a semiconductor crystal, an optical cavity made of a mirror facet for reflecting light into the optical waveguide, and an optical gain region occupying at least part of the optical waveguide for generating an optical gain when powered. The optical gain region exists over a linear portion of the optical waveguide. The remaining portion of the optical waveguide is at least partially bent in structure.
Claims20
A semiconductor laser apparatus made of a semiconductor laser device mounted on a substrate, comprising:
- an optical waveguide made of a semiconductor crystal for confining light;
- an optical cavity made of said optical waveguide and a pair of mirror facets for reflecting light into said optical waveguide;
- and
- an optical gain region occupying at least part of said optical waveguide for generating an optical gain when powered;
- wherein said optical gain region exists only over a linear portion of said optical waveguide, the remaining portion of said optical waveguide being at least partially bent in structure.
A semiconductor laser apparatus made of a semiconductor laser device mounted on a substrate, comprising:
- an optical waveguide made of a semiconductor crystal for confining light;
- an optical cavity made of said optical waveguide and a pair of mirror facets for reflecting light into said optical waveguide;
- and
- an optical gain region occupying at least part of said optical waveguide for generating an optical gain when powered;
- wherein said optical gain region exists over a linear portion of said optical waveguide, the remaining portion of said optical waveguide being at least partially bent in structure;
- and
- wherein said pair of mirror facets is formed on a same cleaved facet.
A semiconductor laser apparatus made of a semiconductor laser device mounted on a substrate, comprising:
- an optical waveguide made of a semiconductor crystal for confining light;
- an optical cavity made of said optical waveguide and a pair of mirror facets for reflecting light into said optical waveguide;
- and
- an optical gain region occupying at least part of said optical waveguide for generating an optical gain when powered;
- wherein said optical gain region exists over a linear portion of said optical waveguide, the remaining portion of said optical waveguide being at least partially bent in structure;
- and
- wherein that portion of said optical waveguide which is different from the portion constituting said optical gain region is branched and connected to a beam outlet optical waveguide, a tip of the beam outlet optical waveguide being arranged to emit a laser beam.
A semiconductor laser apparatus made of a semiconductor laser device mounted on a substrate, comprising:
- an optical waveguide made of a semiconductor crystal for confining light;
- an optical cavity made of said optical waveguide and a pair of mirror facets for reflecting light into said optical waveguide;
- and
- an optical gain region occupying at least part of said optical waveguide for generating an optical gain when powered;
A semiconductor laser apparatus made of a semiconductor laser device mounted on a substrate, comprising:
- an optical waveguide made of a semiconductor crystal for confining light;
- an optical cavity made of said optical waveguide and a pair of mirror facets for reflecting light into said optical waveguide;
- and
- an optical gain region occupying at least part of said optical waveguide for generating an optical gain when powered;
- wherein said optical gain region exists over a linear portion of said optical waveguide, the remaining portion of said optical waveguide being at least partially bent in structure, a bent region of said optical waveguide being made of a material such that a difference in refractive index between said material and another material outside the bent region is larger than a difference in refractive index between a material inside of the optical gain region and another material outside the optical gain region.
Dependencies are inferred from the claim text.