Surface emitting laser
AssigneeCanon Kabushiki Kaisha
InventorsYasuhiro Nagatomo, Takeshi Uchida
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Abstract
A surface emitting laser having a laminated structure has a first region and a second region. The first region is a region having at least one guided mode, a propagation mode in which light is propagated in the in-plane direction of a substrate at a laser oscillation wavelength. The second region is a region having a substrate radiation mode in which light is emitted to the side of the substrate at the laser oscillation wavelength.
Claims7
A surface emitting laser comprising a laminated structure in which, on a substrate, a two-dimensional photonic crystal having a resonance mode in an in-plane direction of the substrate, an optical waveguiding layer, and a cladding layer for light confinement provided between the optical waveguiding layer and the substrate are laminated,
- wherein the laminated structure includes a first region having at least one guided mode as a propagation mode in which light is propagated in the in-plane direction at a laser oscillation wavelength and a second region having a substrate radiation mode in which light is emitted to a side of the substrate at the laser oscillation wavelength,
- wherein the first region includes the two-dimensional photonic crystal,
- wherein the cladding layer has an uneven thickness in an in-plane direction of the substrate, and
- wherein a first cladding layer portion included in the first region has a larger thickness than a second cladding layer portion included in the second region.
A surface emitting laser array comprising a plurality of surface emitting lasers arranged in a two-dimensional array,
- wherein each surface emitting laser includes a laminated structure in which, on a substrate, a two-dimensional photonic crystal having a resonance mode in an in-plane direction of the substrate, an optical waveguiding layer, and a cladding layer for light confinement provided between the optical waveguiding layer and the substrate are laminated,
- wherein the laminated structure includes a first region having at least one guided mode as a propagation mode in which light is propagated in the in-plane direction at a laser oscillation wavelength and a second region having a substrate radiation mode in which light is emitted to a side of the substrate at the laser oscillation wavelength, and
- wherein the first region includes the two-dimensional photonic crystal,
- wherein the cladding layer has an uneven thickness in an in-plane direction of the substrate, and
- wherein a first cladding layer portion included in the first region has a larger thickness than a second cladding layer portion included in the second region.
Dependencies are inferred from the claim text.