Optical amplifier, method for optical amplification and optical transmission system
US6704137B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 2001 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Aug 27, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/09415
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides an optical amplifier for amplifying and outputting an input optical signal, and the optical amplifier comprises an erbium-doped optical fiber (EDF) (3), a laser diode (1), a WDM coupler (2), and a temperature setting control unit (8). A pumping light outputted from the laser diode (1) is divided at a given wavelength by the WDM coupler (2) to a light component on long wavelength side and a light component on short wavelength side, and these are separately outputted. Among these light components, the light component on long wavelength side is inputted to the EDF (3) as a forward pumping light. The light component on short wavelength side is inputted as a backward pumping light. The temperature setting control unit (8) sets a ratio of forward pumping light intensity to backward pumping light intensity and controls temperature of the laser light source according to the preset value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.