Tunable device for and method of extracting and inserting optical carriers in optical communications networks
US6836621B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 2000 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Feb 23, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/585
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A carrier is extracted from a stream of optical signals including plural wavelength division, multiplexed carriers modulated by corresponding signals while a carrier having the same wavelength as the extracted carrier is inserted into the stream. The stream of optical signals and the carrier to be inserted are coupled to a tunable wavelength selector having first wavelength and phase shift properties. Tuning of the wavelength selector is changed, so it has second wavelength and phase shift properties such that the entire stream of optical signals is coupled from an input port to an output port via the tunable wavelength selector, and the extracting and inserting operation is not performed while the tuning is changed. The other carriers are coupled from the input port to the output port via the selector while extracting and inserting are performed, and the selector has the first wavelength and phase shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.