Electro-optic compound waveguide intensity modular and method using same
US5892857A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1997 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Jan 21, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29395
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optic modulator is disclosed in the form of a compound waveguide device having a channel waveguide in optical proximity to an elongate waveguide propagating an optical signal therein. The channel waveguide includes a coupling surface through which optical energy is evanescently coupled to or from the optical signal propagating in the elongate waveguide. The channel waveguide is shaped to confine distribution of the optical energy therein along axes transverse to the axis of propagation of the optical energy. Transverse diffraction of the optical energy within the channel waveguide is thereby limited. The channel waveguide is formed from an electro-optically active material, and modulation of the optical signal propagating in the elongate waveguide is effected using the evanescent coupling effect between the two waveguides. In one embodiment, the elongate waveguide is a side-polished fiber-optic waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.