Method and apparatus for reduction of optical communication system impairments
US5373385A · kind A · utility
42Cited by
1References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Nov 12, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2537
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for reducing noise in optical communication systems is effected by modulating or dithering the laser output frequency at a relatively low rate. The laser may be dithered by applying a low frequency sine wave either to the resistive heater in the phase control section or to the laser's active section directly. By dithering the laser at a low frequency and at a sufficiently high amplitude to cause large optical frequency excursions, the noise caused by multipath interference will decrease without substantially increasing negative dispersion effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.