Laser control in a coherent optical receiver
US7899340B1 · kind B1 · utility
42Cited by
15References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2006 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Nov 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0004
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and systems for compensating a frequency mismatch Δf between a local Oscillator (LO) of a coherent optical receiver and a carrier of a received optical signal. An average frequency of the LO is controlled to compensate at least long-period variations of the frequency mismatch. An electrical carrier recovery circuit for compensating short period variations of the frequency mismatch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.