Patent ID: 7656924
Filing Date: 2010-02-02
Classification: B82Y,H01S

Abstract:
1. A surface emitting laser, comprising: a lower reflective layer, a lower cladding layer, an active layer, an upper cladding layer, and an upper reflective layer sequentially stacked on a GaAs substrate; a plurality of mirror layers being stacked and for forming the upper reflective layer and the lower reflective layer, each mirror layer in the plurality of the mirror layers including a pair of a low-refractive-index layer having an optical length that is a quarter of an emission wavelength, and a high-refractive-index layer having an optical length that is a quarter of an emission wavelength, the low-refractive-index layer including Al a selectively oxidized area being formed of selectively oxidizing Al a current injection area that is sandwiched by the selectively oxidized area, wherein the active layer emits a laser beam having a wavelength of equal to or more than 1260 nanometers and equal to or less than 1360 nanometers in a single lateral mode oscillation, in a direction perpendicular to the GaAs substrate, and a difference between a first effective refractive index of a first area in the stacking direction including the current injection area and a second effective refractive index of a second area in the stacking direction including the selectively oxidized area is equal to or less than 0.038.