Method and device for optical amplification
US6823107B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a device for optical amplification, and a primary object of the present invention is to provide a method and device for optical amplification which can maintain the wavelength characteristic of gain constant and can obtain a wide input dynamic range. The device according to the present invention includes a first optical amplifying unit having a Raman amplifying medium and a first pump source for pumping the Raman amplifying medium, and a second optical amplifying unit optically connected to a rear stage of the first optical amplifying unit. The second optical amplifying unit has an optical amplifying medium and second pump sources for pumping the optical amplifying medium. The present invention is characterized by a control unit for controlling the gain of the first optical amplifying unit so that variations in output power of the first optical amplifying unit due to variations in input power of the first optical amplifying unit are canceled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.