Optical integrated modulator
US5061030A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1990 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Aug 14, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0356
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention enables low voltage operation and improves matching in velocities of the radio frequency and of light by lowering effective index and to thereby expand modulation frequency bandwidth by structuring an optical modulator where a substrate of the material of which refractive index changes by an application of electric field description, and the insulating buffer layers are eliminated from the regions other than the electrodes. By structuring the modulator in a manner to satisfy the prescribed conditions with dimensions of each unit, the light can be matched in complete phase matching (group velocity matching) with radio frequency while characteristic impedance of the electrodes is fixed at a desired value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.