Coherent optical communication apparatus and method
US8081885B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2008 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Jul 12, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/505
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a coherent optical communication apparatus and method. According to the invention, the optical communication apparatus receives a modulated optical signal, which is generated by modulating an optical signal with a first electrical signal obtained by adding a second electrical signal carrying information to be transmitted and a reference electrical signal, and converts the modulated optical signal to a third electrical signal by coherent detection. Then the apparatus detects an amount of fluctuation of the reference electrical signal included in the third electrical signal, and compensates the second electrical signal included in the third electrical signal using the amount of fluctuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.