Optical laser control for optical communications systems
US7805082B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 2004 |
| Grant date | Sep 28, 2010 |
| Priority date | — |
| Expiry date | May 21, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/58
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical communications system comprises a transmitter, a receiver and an optical communications link between the transmitter and receiver. The transmitter comprises a current-driven directly modulated laser for providing a modulated optical signal and a current controller for controlling the current waveform applied to the laser. The current waveform applied to the laser is determined to compensate for the effects of the laser non-linearities and the fiber chromatic dispersion. This system applies pre-compensation to the directly modulated laser input current waveform to provide both pre-compensation for chromatic dispersion and compensation for the non-linearities of the directly modulated laser. These are two of the main limiting factors in providing a low cost high data rate and long reach optical communications system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.