Optical semiconductor device
AssigneeFujitsu Limited
InventorTomoyuki Akiyama
Life of this patent
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Abstract
An optical semiconductor device includes a laser oscillator on a semiconductor substrate; and an optical modulator on the semiconductor substrate. The laser oscillator includes a pair of reflecting mirrors at least one of which is a loop mirror, and the loop mirror includes a loop waveguide and a plurality of first ring resonators serially inserted in the loop waveguide. The optical modulator includes a plurality of second ring resonators connected in cascade along a modulator waveguide. A transmission band width of the first ring resonator is set greater than a transmission band width of the second ring resonator.
Claims10
An optical semiconductor device comprising:
- a laser oscillator on a semiconductor substrate;
- and
- an optical modulator on the semiconductor substrate,
- wherein the laser oscillator includes a pair of reflecting mirrors at least one of which is a loop mirror, and the loop mirror includes a loop waveguide and a plurality of first ring resonators serially inserted in the loop waveguide,
- wherein the optical modulator includes a plurality of second ring resonators connected in cascade along a modulator waveguide,
- wherein a transmission band width of the first ring resonator is set greater than a transmission band width of the second ring resonator.
Dependencies are inferred from the claim text.