Optical fiber communication system incorporating automatic dispersion compensation modules to compensate for temperature induced variations
US6307988A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Jul 28, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/252
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A high speed optical communication system (.gtoreq.10 Gbit/s) is compensated for temperature variation by providing it with one or more automatic dispersion compensation modules. Each module has an adjustable dispersion element, a data integrity monitor and a feedback network whereby the monitor adjusts the dispersion element to compensate for temperature variation. In a preferred embodiment the dispersion compensating modules comprise chirped fiber Bragg gratings in which the chirp is induced in the grating by passing a current along distributed thin film heaters deposited along the length of the fiber. The magnitude of the applied current determines the dispersion of the grating. A data integrity monitor is configured to sense the integrity of transmitted data and to provide electrical feedback for controlling the current applied to the grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.