Surface-emitting laser device
AssigneeMitsui Chemicals, Inc.
InventorAtsushi Okubo
Life of this patent
Estimating the term…
Abstract
In a surface-emitting laser device, an Al0.16Ga0.84As cladding layer, a GaAs optical waveguide layer, an Al0.30Ga0.70As carrier block layer, a GaAs side barrier layer, an InGaAs active layer, a GaAs side barrier layer, an Al0.30Ga0.70As carrier block layer, a GaAs optical waveguide layer, an Al0.16Ga0.84As cladding layer, an etching stop layer, and a contact layer are formed on a GaAs substrate in this sequence. A inclined facet which functions as a reflecting mirror is formed on a resonator optical axis between a horizontal resonator facet and a vertical resonator facet. With the constitution, thermal saturation and facet degradation can be suppressed as much as possible and high optical output power can be obtained.
Claims12
A surface-emitting laser device comprising:
- an active layer;
- a pair of optical waveguide layers disposed on both sides of the active layer, having a band gap wider than or equal to that of the active layer;
- a pair of cladding layers disposed so as to sandwich the active layer and the optical waveguide layers, having a band gap of wider than or equal to that of the optical waveguide layers;
- a carrier block layer for confining carriers into the active layer disposed between the active layer and at least one of the optical waveguide layers, having a band gap wider than or equal to those of the active layer and the optical waveguide layer;
- and
- an inclined facet, formed so as to diagonally cross with an optical axis along the active layer, for reflecting light generated in the active layer to a layer thickness direction, wherein ends of the carrier block layer, pair of waveguide layers and pair of cladding layers constitute a part of the inclined facet whereby thermal resistance can be reduced.
A surface-emitting laser device comprising:
- an active layer;
- a pair of optical waveguide layers disposed on both sides of the active layer, having a band gap wider than or equal to that of the active layer;
- a pair of cladding layers disposed so as to sandwich the active layer and the optical waveguide layers, having a band gap of wider than or equal to that of the optical waveguide layers;
- a carrier block layer for confining carriers into the active layer disposed between the active layer and at least one of the optical waveguide layers, having a band gap wider than or equal to those of the active layer and the optical waveguide layer;
- and
- an inclined facet formed so as to diagonally cross with an optical axis along the active layer, for reflecting light generated in the active layer to a layer thickness direction, wherein ends of the carrier block layer, pair of waveguide layers and pair of cladding layers constitute a part of the inclined facet whereby at least one of thermal saturation and facet degradation at the inclined facet can be suppressed.
Dependencies are inferred from the claim text.