Optical modulation amplitude compensation system having a laser driver with modulation control signals
US7504610B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 2007 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Sep 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/564
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The power control system utilizing a normal average power control loop to control average power and modulation level of an optic signal generated by an optic signal generator. The target average power is adjusted by a small percentage, and the corresponding change in bias current needed to adjust the average power level is monitored. The change in average power divided by the change in bias current is a measure of the optic signal generator's slope efficiency. Modulation current is adjusted up or down based on the change in slope efficiency compared to the slope efficiency stored at the time of module calibration. By adjusting the modulation current, the desired optic signal output from the transmitter may be maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.