Electronic dispersion compensation for low-cost distributed feedback-directly modulated laser
US9166698B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Feb 12, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/25137
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Exemplary embodiments of the present invention relate to electronic dispersion compensation (EDC). The interaction between the frequency chirp and the fiber dispersion is newly analyzed. The linear and nonlinear properties of the chirp-dispersion are separately analyzed. A pre-compensating transmitter may consist of a phase interpolator (PI), a 2 tap data generator, a pulse widening CLK generator, a rising pattern detector, 4:1 Mux and an output driver. A post-compensating receiver may consist of linear equalizer for the rabbit ear compensation, nonlinear equalizer for tilting compensation, typical high frequency boosting equalizer (EQ) and limiting amp (LA).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.