Optical modulator

Details Optical modulator Optical modulator

2007-07-17

2007-07-17

Kim, Ellen E. (Department: 2874)

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

Reexamination Certificate

active

11233661

ABSTRACT:
The present invention provides a cost-saving and space-saving optical modulator enabling application of modulation signals with high phase difference accuracy without using a separate component for generating a phase difference outside of the optical modulator, when identical modulation signals having a predetermined phase difference are applied into a plurality of modulation electrodes.An optical modulator20including a substrate with an electro-optic effect, a plurality of optical waveguide sections10formed on the substrate, and a plurality of modulation electrodes21and22for modulating lights passing through the optical waveguide sections, and into which identical modulation signals having a predetermined phase difference are applied, wherein a branch element for branching a modulation signal into a plurality of modulation signals is formed, and a delay line for generating the phase difference is formed in the middle of lines for applying the modulation signals branched by the branch element into the plurality of modulation electrodes.

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