Optical amplifier device
US5604627A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1996 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Feb 12, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2972
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The optical amplifier device for an optical transmission system with bidirectional wavelength multiplex to a light transmission wave guide includes a first optical amplifier (OV1) for amplifying signals of a first wavelength (.lambda..sub.1) in a first direction; a second optical amplifier (OV2) for amplifying signals of a second wavelength (.lambda..sub.2) in a second direction; a first wavelength selective coupler (WDM1) connecting the input of the first optical amplifier (OV1) and the output of the second optical amplifier (OV2) with a light transmission wave guide (U) and a second wavelength selective coupler (WDM2) connecting the input of the second optical amplifier (OV2) and the output of the first optical amplifier (OV1) with the light transmission wave guide (U). Because of reflections noise amplification due to resonance would be considerable but according to the invention the noise resonances are prevented since the wavelength selective couplers (WDM1, WDM2) have a signal attenuation of 3 dB at different wavelengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.