Method of apparatus for remotely pumping a rare-earth doped optical fiber amplifier and a communication system employing same
US6141468A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1999 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Feb 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2916
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided for providing pump energy to a doped optical fiber located along an optical transmission path. The doped optical fiber imparts amplification to an optical signal when pumped at a pump wavelength. In accordance with the method, pump energy is generated in the transmission fiber by introducing a power at a wavelength one Raman Stokes order below the desired pump wavelength. The pump energy is transmitted along the transmission path such that first order Raman Stokes-shifted light is applied to the doped optical fiber. For example, if the optical fiber is doped with erbium, which has a pump wavelength of about 1485 nm, pump energy is provided at a wavelength of 1390 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.