Apparatus and method for coherent optical multiplexing 1+1 protection
US11374673B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2021 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Jun 1, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/614
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Coherent optical multiplexing 1+1 protection disclosed herein uses multiplexers, each having multiplexing and demultiplexing sub-units. Relay ports of a node are connected with the multiplexers, and each relay port is configured to input and output optical signals with the corresponding multiplexer. Two transmission ports of the node are connected with disjoint paths and are configured to input and output optical signals therewith. The node includes: a first optical splitter having input ports connected with the relay ports and two output ports connected with the two transmission ports; an optical switch connected with the transmission ports respectively via two input interfaces; a second optical splitter, which is a 1×N optical splitter, having one input port connected with an output interface of the optical switch and having output ports connected with the relay ports. The solution is reliable in implementation, has low insertion loss, and has good transmission performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.