Optical modulator
US7245788B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2005 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Sep 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/225
- WIPO fieldOptics
- WIPO sectorInstruments
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 modulator 20 including a substrate with an electro-optic effect, a plurality of optical waveguide sections 10 formed on the substrate, and a plurality of modulation electrodes 21 and 22 for 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.