Optical modulators operated in parallel push-pull mode
US7082237B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2003 |
| Grant date | Jul 25, 2006 |
| Priority date | — |
| Expiry date | Jan 20, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/101
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A Mach-Zehnder interferometer modulator for modulating a beam of laser light includes a pair of separate waveguides through which the laser light is passed after splitting in a splitting zone and after which the light is recombined in a merge zone. The waveguides are formed in a semiconductor material with one of the electrodes of each pair being formed in a doped layer while the other electrode, the top electrode, is a surface metalisation. The doped layer is trenched so that adjacent electrodes in the doped layer are electrically isolated from one another so that one of the electrodes in the doped layer can be connected with a different electrical polarity to the other electrode in the doped layer thereby permitting the connection of the pairs of electrodes in parallel anti-phase mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.