All optical RF signal channelizer
US6094285A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1996 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Dec 4, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/006
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A channelizer for signals for optically channelizing RF signals modulated onto an optical carrier by optically separating the RF signals and mapping the RF signals by way of an optically dispersive element, such as a diffraction grating. In an alternate embodiment of the invention, two stages of optical filters elements are provided in series to perform sequential channelization. Bragg reflection gratings are used for coarse filtering into predetermined bands while Fabry-Perot filters tuned to specific sub-bands of the Bragg reflection gratings are used for channelization. In alternate embodiments of the invention, a silica planar waveguide and an optical splitting device, such as a Talbot splitter, are used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.