OPTICAL SEMICONDUCTOR DEVICE

摘要

An optical semiconductor device includes: semiconductor lasers; a wave coupling section multiplexing light output by the semiconductor lasers; first optical waveguides respectively optically connecting respective semiconductor lasers to the wave coupling section; a phase regulator regulating phase of reflected light that is reflected at a reflecting point located in the optical semiconductor device and that returns to the semiconductor lasers; a second optical waveguide optically connecting the wave coupling section to the phase regulator; an optical amplifying section amplifying output light of the phase regulator; and a third optical waveguide optically connecting an output of the phase regulator to the optical amplifying section. The phase regulator adjusts the phase of reflected light that returns to the semiconductor lasers to decrease line width of the light output by the semiconductor lasers.

主权项

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 and that returns to 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; and 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.