Patent ID: 6021148
Filing Date: 2000-02-01
Classification: H01S

Abstract:
A semiconductor laser device including:a compound semiconductor substrate;a semiconductor laser emitting laser light and a light modulator modulating the laser light, integrated on the compound semiconductor substrate and including a common mesa structure containing an active layer and extending through the semiconductor laser and the light modulator integrated on the semiconductor substrate; anda current blocking structure disposed on the semiconductor substrate on opposite sides of and contacting the common mesa structure, the current blocking structure includinga semi-insulating semiconductor layer extending continuously along the common mesa of the semiconductor laser and the light modulator,an n type semiconductor layer covering the semi-insulating semiconductor layer, the n type semiconductor layer having a first region adjacent the common mesa structure at the semiconductor laser and a second region adjacent the common mesa structure at the light modulator, the first and second regions of the n type semiconductor layer being discontinuous from each other between the semiconductor laser and the light modulator, andan intervening layer having an energy band gap larger than that of the n type semiconductor layer, the intervening layer extending continuously through the semiconductor laser and the light modulator and supporting the n type semiconductor layer.