Optical amplifier
US6222962A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Nov 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0675
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical amplifier including a pumping optical source, a plurality of erbium doped optical fibers for amplifying optical signals of a plurality of wavelengths using pumping light generated by the pumping optical source, and a plurality of gratings alternately connected to the optical fibers, for reflecting an optical signal of a specific wavelength among different wavelength optical signals amplified by the optical fibers, wherein when optical signals for channels have different powers, the optical signal power for each individual channel is equalized by amplifying and reflecting the optical signals at different positions with different amplification gains. Accordingly, in a system having a great loss such as long-distance transmission, optical signals of different wavelengths are reflected at different positions, and amplified by a gain medium, thus making power equalization possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.