Patent ID: 7864824
Filing Date: 2011-01-04
Classification: B82Y,H01S

Abstract:
1. A multiple distributed feedback laser device comprising: a substrate comprising a first distributed feedback region, a modulation region, and a second distributed feedback region; an active layer on the substrate in the first distributed feedback region, the modulation region, and the second distributed feedback region; a first diffraction grating disposed in the first distributed feedback region and coupled to the active layer in the first distributed feedback region; a second diffraction grating disposed in the second distributed feedback region and coupled to the active layer in the second distributed feedback region; a first micro heater supplying heat to the first diffraction grating; a second micro heater supplying heat to the second diffraction grating; a lower cladding layer between the active layer and the substrate; and an upper cladding layer on the active layer, wherein the first micro heater and the second micro heater are controlled independently of each other, a first laser current is supplied to the active layer in the first distributed feedback region to oscillate a first light source having a first wavelength, a second laser current is supplied to the active layer in the second distributed feedback region to oscillate a second light source having a second wavelength, and a reverse bias is applied in the modulation region to the upper cladding layer, the active layer, and the lower cladding layer, to cause an electro absorption phenomenon within the modulation region.