Tri-electrode traveling wave optical modulators and methods
US6567203B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2001 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Feb 23, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/127
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention discloses phase-shifters, modulators, and method that produces a smaller &pgr; by means of a field excitation using multiple electrodes. A negative signal is introduced that travels with the positive signal, which enhances the electric field significantly. The field enhancement is provided by the superposition of the fields accumulated from each electrode. A base or substrate material can be made from any compound having linear so electro-optic properties, such as lithium niobate, lithium tantalite, potassium lithium niobate, potassium titanyl phosphate or gallium-arsenide. For lithium niobate, there are two possible orientations of electric field, z-cut orientation or x-cut orientation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.