Patent ID: 7957446
Filing Date: 2011-06-07
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser comprising: a first optical confinement layer that is disposed on a cladding region and that has a main surface including a first area, a second area, and a third area; a plurality of first quantum wires arranged on the first area along a predetermined axis; a plurality of second quantum wires arranged on the second area along the predetermined axis; buried semiconductor regions disposed between side faces of the first quantum wires and between side faces of the second quantum wires; an active layer disposed on the third area and extending from an end of the third area to another end of the third area along the predetermined axis; a first distributed Bragg reflector disposed on the first area and including the plurality of first quantum wires and the buried semiconductor regions disposed between the side faces of the first quantum wires; a second distributed Bragg reflector disposed on the second area and including the plurality of second quantum wires and the buried semiconductor regions disposed between the side faces of the second quantum wires; and a second optical confinement layer disposed on the first distributed Bragg reflector, the second distributed Bragg reflector, and the active layer, wherein the first area, the second area, and the third area are arranged along the predetermined axis, the third area is disposed between the first area and the second area, the buried semiconductor regions have a refractive index different from an average refractive index of the first quantum wires and an average refractive index of the second quantum wires, each of the first quantum wires includes first well layers and first barrier layers that are alternately stacked, each of the second quantum wires includes second well layers and second barrier layers that are alternately stacked, the active layer includes third well layers and third barrier layers that are alternately stacked, the first well layers, the second well layers, and the third well layers are composed of the same material, and the first barrier layers, the second barrier layers, and the third barrier layers are composed of the same material.