Wavelength division multiplexing passive optical network including broadcast overlay
US5694234A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1995 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Aug 14, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J2014/0253
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A passive optical network is provided that spectrally slices optical signals transmitted in both upstream and downstream directions utilizing wavelength division multiplexing routing. The passive optical network preferably includes an incoherent signal source at both ends to provide signals that are spectrally sliced according to optical frequency. The downstream information may be transmitted in a conventional data format. The upstream transmissions may be segregated by subcarrier multiplexing, time scheduling or wavelength division multiplexing. A broadcast signal can be overlayed with point-to-point information for transmission to plural network units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.