Broadband Raman pre-amplifier for wavelength division multiplexed optical communication systems
US6151160A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Oct 5, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2916
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical WDM transmission system. The arrangement includes a splitter for dividing a multiplexed optical signal having a prescribed bandwidth into a plurality of distinct sub-bands. The plurality of distinct sub-bands is received by a plurality of output paths, respectively, which direct the sub-bands to respective ones of a plurality of optical amplifiers disposed in the output paths. The optical amplifiers each have a prescribed gain shape across the bandwidth of its respective sub-band. A coupler recombines the distinct sub-bands and couples them onto the optical fiber transmission path. An optical preamplifier is coupled to an input of the splitter. The optical preamplifier is a Raman amplifier having a bandwidth substantially encompassing the prescribed bandwidth of the multiplexed optical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.