Combined phase and polarization modulation for optical communication
US8320764B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2009 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Sep 30, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/65
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention relates to a modulation scheme for optical communication, in particular for fiber optics communication. According to invention, an optical signal is generated, both phase and polarization of which modulated in dependency of the data to be transmitted. Preferably, the generated optical signal comprises a sequence of symbols (22a-22k) and each symbol (22a-22k) has one of two different phase states and one of two different orthogonal polarization states. Bits of the data stream to be transmitted are encoded both in the phase state of a symbol (or in the phase state difference between subsequent symbols) and in the polarization state of the symbol (or in the polarization state difference between the subsequent symbols).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.