Patent ID: 6891870
Filing Date: 2005-05-10
Classification: B82Y,H01S

Abstract:
1. An integrated semiconductor device comprising: a semiconductor substrate; a laser on the substrate having an active layer and a periodically spaced current-induced grating disposed near the active layer, wherein the periodically spaced current-induced grating modulates gain in the active layer in the direction of light propagation for providing periodic modulation of the gain of the active layer and periodic modulation of a differential refractive index between the different indices of the active layer and of the periodically spaced current-induced grating to determine a wavelength of a light emitted from a laser cavity formed from the length L of the active layer, wherein the light emitted is a single-mode output light signal at a data rate greater than 622 Mb/sec in isolator-free operation; and an electrical contact over the periodically spaced current-induced grating for providing current to the grating to control the wavelength of the light emitted from the laser.