Optical add/drop wavelength division multiplex systems
US6208441A · kind A · utility
50Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1998 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Sep 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0201
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical-wavelength division multiplexing system, method and branching unit. The arrangement drops one, or more than one, predetermined wavelength signal(.lambda.2) from a trunk(18) onto a branch and adds signals(.lambda.2') at the predetermined wavelength, or at a predetermined different wavelength from the branch out of the trunk. A sensor(34) senses the level of the signal(s) dropped and a controller(36), which responds to the control signal, adjusts the level of the add signal(s)(.lambda.2') to an optimum level for adding to the trunk(18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.