Coherent receiver, method, and system for coherent light source frequency offset estimation and compensation
US9900107B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2017 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Oct 9, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present disclosure disclose a coherent receiver, including: a frequency offset estimation unit and a frequency offset compensation unit, where the frequency offset estimation unit is configured to receive signal light and local oscillator light, where the signal light is received by a first photoelectric detector, and a first intensity value is obtained, the signal light is received by a second photoelectric detector, and a second intensity value is obtained, the local oscillator light is received by a third photoelectric detector, and a third intensity value is obtained, and the local oscillator light is received by a fourth photoelectric detector, and a fourth intensity value is obtained; and the frequency offset compensation unit is configured to obtain a frequency offset value between the signal light and the local oscillator light according to a difference between a first ratio and a second ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.