Optical modulator
US8175422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2009 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Oct 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/3558
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an optical modulator, a first electrode portion having a plurality of first electrodes is provided on the upper surface of a base part having a periodically-poled structure and a second electrode portion is provided on the lower surface thereof, and voltage is applied in one direction between the first electrode portion and the second electrode portion, to thereby cause a periodic change of the refractive index in a polarization-part array direction in the periodically-poled structure and diffract light which enters the base part. This allows reduction in the voltage applied between the first electrode portion and the second electrode portion, and it is thereby possible to form a desired electric field inside the periodically-poled structure while achieving a high-density channel arrangement. By reducing the voltage, the rate of the optical modulation performed by the optical modulator can be increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.