Optical transmission system
US5463487A · kind A · utility
68Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1994 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Jul 29, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/02216
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a wavelength division optical transmission system incorporating optical amplifiers, an identifying pilot tone is modulated on to each multiplexed wavelength. Each system amplifier determines from the pilot tones the total number of wavelengths being transmitted and thereby provides a corresponding adjustment of the amplifier gain. This prevents overamplification when one or more wavelengths is missing from the multiplexed signal e.g. as the result of a transmitter fault.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.