Metropolitan area type optical telecommunications network comprising a ring type core
US7340176B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2003 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Sep 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/2852
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical telecommunications network (1000), of metropolitan area type, having a ring type core (10), and secondary rings (41, 42; 43, 44). In each sending access node (11), transmitters (111) for sending information-carrying optical signals use a wavelength belonging to a group of wavelengths dedicated to the secondary ring (41, 42) to which this sending access node (11) is connected. In each destination access node (21), receivers (212) are capable of receiving all the wavelengths used by sending nodes (11) of the network. Communication nodes (1, 2) comprise all-optical devices (100, 101, 10; 201, 20) for inserting, into the core fiber (10), optical signals sent by a sending access node connected to the communication nodes. Optical couplers (31, 32), for taking from the core fiber (10) a so-called representative signal formed of a fraction of the power of each information-carrying signal, are respectively coupled to the receivers of the destination nodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.