Patent ID: 7197056
Filing Date: 2007-03-27
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device having an oscillation wavelength of more than 0.76 μm and less than 0.8 μm, the semiconductor laser device comprising: a first conductive-type cladding layer; a first guide layer; a strained quantum well active region including a well layer to which a compressive strain is introduced; a second guide layer; and a second conductive-type cladding layer, at least which are sequentially stacked on a GaAs substrate, wherein the well layer is formed of InGaAs where a(well) is defined as a lattice constant of a constituent material of the well layer, and where a(GaAs) is defined as a lattice constant of the GaAs substrates, and the laser device has an oscillation wavelength of more than 0.76 μm and less than 0.8 μm.