Systems and methods for the mitigation of polarization mode dispersion impairments in fiber optic links
US8045855B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 2008 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | May 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2569
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides systems and methods for the mitigation of PMD impairments in fiber optic links. The present invention utilizes synchronous polarization modulation and digital control of polarization modulation, instead of independent polarization modulators and analog control used in the current state of art. Also, the present invention utilizes a feedback loop to avoid identified bad polarization states instead of a random open loop operation. Further, the present invention includes a mechanism to continually update polarization states based on pre-corrected FEC error analysis from data receivers. Additionally, the present invention includes a mechanism for collecting and correlating error feedback signals from multiple geographically-diverse network nodes. Advantageously, the present invention provides a cost-effective and efficient way to implement mitigation of PMD impairments, while using only a small fraction of the FEC error correction capability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.