Patent ID: 9042008
Filing Date: 2015-05-26
Classification: H01S,H04B,H04J

Abstract:
1. An optical semiconductor device comprising: a plurality of semiconductor lasers; a wave coupling section multiplexing light output by the plurality of the semiconductor lasers; first optical waveguides respectively optically connecting respective semiconductor lasers to the wave coupling section; a first phase regulator regulating phase of reflected light that is reflected at a reflecting point located in the optical semiconductor device, wherein the reflected light travels toward the plurality of semiconductor lasers; a second optical waveguide optically connecting the wave coupling section to the first phase regulator; an optical amplifying section amplifying output light of the first phase regulator; a third optical waveguide optically connecting an output of the first phase regulator to the optical amplifying section, wherein the first phase regulator adjusts the phase of the reflected light to decrease line width of the light output by the plurality of semiconductor lasers; an optical modulator optically connected to an output of the optical amplifying section; and a fourth optical waveguide optically connecting an output of the optical amplifying section to the optical modulator.