Patent ID: 8101957
Filing Date: 2012-01-24
Classification: H01S

Abstract:
1. A semiconductor laser chip comprising: an optical semiconductor device having a semiconductor substrate, an optical semiconductor region and a gain region; the optical semiconductor region being provided on the semiconductor substrate and having a width smaller than that of the semiconductor substrate, a heater being provided on the optical semiconductor region, the optical semiconductor region having a cladding region, an optical waveguide layer and a low thermal conductivity layer, the optical waveguide layer being provided in the cladding region and having a refractive index higher than that of the cladding region, the low thermal conductivity layer being provided between the optical waveguide layer and the semiconductor substrate and having a thermal conductivity lower than that of the cladding region, the gain region being provided on the semiconductor substrate and being optically coupled to the optical waveguide layer.