Patent ID: 11874538
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. An optical signal modulator for modulating an optical carrier signal, comprising:
a directional coupler comprising:
a first waveguide; and
a second waveguide optically coupled to the first waveguide;

a first ring modulator configured to control an amount of light passing therethrough from the first waveguide based upon a first differential signal applied to the first ring modulator to generate a first output;
a second ring modulator configured to control an amount of the light passing therethrough from the second waveguide based upon a second differential signal and applied to the second ring modulator to generate a second output; and
an optical signal combiner optically coupled to the first ring modulator and to the second ring modulator and configured to combine the first output and the second output to generate a combined output, wherein no heater surrounds any portion of either of the first ring modulator or the second ring modulator.