Systems and methods for analog electronic polarization control for coherent optical receivers
US10735104B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2019 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Apr 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/336
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Described herein are systems and methods that manage polarization in coherent optical receivers by using analog signal processing that eliminates the need for ultra-fast, power-hungry ADCs and DSPs and that would require digitization of the full-bandwidth signal path and result in bulky and expensive circuit designs. Various embodiments of the invention provide polarization correction by using an analog polarization correction circuit that implements the equivalent of two matrix operations. This is accomplished by using analog electronics that comprises a combination of variable and unity gain amplifiers to align polarizations of input signals to generate a polarization-corrected output signal that is further aligned with the polarization frame of reference of the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.