Patent ID: 6590919
Filing Date: 2003-07-08
Classification: H01S

Abstract:
A nitride group compound semiconductor laser device, comprising:a pair of cladding layers; an active layer interposed between the cladding layers; and a current constriction layer having a stripe-shaped opening which is to be a current passage, provided above the active layer, wherein the current constriction layer has a light absorption coefficient of less than 1Ã—105 cmâˆ’1 with respect to a laser wavelength in a wavelength region of blue to ultraviolet, so as to provide a light confinement in the lateral direction of waveguide passage by means of light absorption, further wherein the current constriction layer is made of GaxAlyIn1âˆ’(x+y)N (0&lE;x&lE;1, 0&lE;y&lE;1, 0&lE;x+y&lE;1) containing impurities in an amount of 1Ã—1020 cmâˆ’3 or more.