Patent ID: 8767788
Filing Date: 2014-07-01
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device comprising: a semiconductor substrate; a semiconductor laminated section which includes a first conductivity type cladding layer, an active layer, and a second conductivity type cladding layer, sequentially stacked on the semiconductor substrate, and which has a front facet and a rear facet transverse to a resonator length direction; a ridge section located on a top of the semiconductor laminated section; and a pair of terrace sections located on the top of the semiconductor laminated section, and sandwiching and spaced from the ridge section, wherein where λ represents lasing wavelength of the semiconductor laser device, n a represents effective refractive index of the active region, n c represents effective refractive index of the cladding regions, and W represents the width of the active region,