Feedback for electronic pre-distortion in an optical transmitter
US9419722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2014 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Oct 30, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/588
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
We disclose an optical transponder, in which one or more all-electronic feedback paths are used to obtain a relatively accurate estimate of the device-specific signal distortions in the transmitter portion thereof. The obtained estimate is used to enable the digital signal processor of the optical transponder to carry out electronic pre-distortion (EPD) that can significantly reduce or cancel these signal distortions without the use of detailed factory-calibration measurements or optics dedicated to feedback purposes. The use of all-electronic feedback paths may enable a beneficial reduction in the cost of the EPD functionality, e.g., by eliminating a significant extra cost associated with the implementation of optically generated feedback.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.