Control system for a polar optical transmitter
US7787778B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2005 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Aug 11, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/50575
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of controlling a polar optical transmitter comprising a dual-branch Mach-Zehnder (MZ) modulator driven by a pair of independent electrical drive signals. A cost function is provided which defines a relationship between a control parameter of the optical transmitter and a power level of an output optical signal generated by the MZ modulator. A selected component of the electrical drive signals is dithered using a predetermined dither signal. A modulation depth of the output optical signal power level corresponding to the dither signal is detected, and the control parameter adjusted based on the cost function and the detection result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.