Tunable, multi-port optical add-drop multiplexer
US6950609B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | May 21, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0016
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A tunable (reconfigurable) OADM provides multiple drop ports and multiple add ports by which desired channels can be removed from, or added to, a composite optical signal. In one embodiment, a programmable demultiplexer is arranged to receive an input signal containing components at x different wavelengths from an optical input port, and distribute the input signal components among K output ports. K−1 of the output ports are the “drop” ports of the OADM, and cumulatively contain w different wavelengths. The remaining port, which is the “through port” that carries the z wavelengths not dropped from the original input signal, is connected to the first port of an M port programmable multiplexer having M−1 other input ports. The remaining M−1 ports are the “add” ports of the OADM, which cumulatively receive v different wavelengths to be added by the OADM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.