Optimum three dimensional constellations for optical interconnects employing stokes vector receivers
US11245473B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2018 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Aug 3, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/69
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical modulation apparatus comprises first, second, and third optical modulators arranged so as to collectively modulate light coupled into a first optical input in all three dimensions of the three-dimensional Stokes vector space, to produce an optical output signal. The optical modulation apparatus further comprises a modulating circuit having a digital input configured to N generate first, second, and third modulating signals for driving the first, second, and third optical modulators so as to map digital data to an M-point optical constellation in the optical output signal. The points in the M-point optical constellation are distributed in the three-dimensional Stokes vector space such that the constellation figure of merit for the M-point optical constellation equals at least half of the maximum achievable constellation figure of merit for M points in the three-dimensional Stokes vector space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.