Bi-directional optical add/drop multiplexer for WDM optical networks
US7277639B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2004 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Jul 2, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0216
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a bi-directional optical add/drop multiplexer connected to an optical fiber for transmitting optical signals multiplexed in a wavelength division multiplexing optical network and which performs adding/dropping of the optical signals. The optical add/drop multiplexer includes a first wavelength division multiplexer provided with a multiplexing port functioning as a path for forward or backward optical signals and with a plurality of demultiplexing ports, each functioning as a path of demultiplexed channels. A plurality of add/drop parts, each performing adding/dropping of preset channels, and connected with the demultiplexing ports of the first wavelength division multiplexer in one-to-one. A second wavelength division multiplexer connected with the plurality of add/drop parts in one-to-one, provided with a plurality of demultiplexing ports, each functioning as a path for demultiplexed channels and with a multiplexing port functioning as a path for forward or backward optical signals. The first wavelength division multiplexer has a free spectral range equal to that of the second wavelength division multiplexer, in which a wavelength band of the forward optical signals i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.