Frequency selective interwaveguide coupler
US4026632A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1976 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Jan 7, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/055
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The coupler consists of an intermediate finite length waveguide located between a first and at least one second waveguide with the refractive index of the intermediate waveguide being greater than the refractive indices of the other waveguides. The intermediate waveguide further includes a structure which either in a fixed manner as by a surface relief, or in a controlled manner--as by electro-optic or acousto-optic perturbation, produces modes of propagation in the intermediate waveguide for a preselected frequency, such that energy may be coupled to or from the waveguides to the intermediate waveguide by mode matching and this energy may be converted from one mode to another in the intermediate waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.