Amplification method and optical amplifier for wavelength division multiplexed signal light
US7119950B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2005 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Mar 22, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/258
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an optical amplifier of the invention, a WDM signal light is separated into N components by a demultiplexer after which each component is amplified by N optical amplifier sections, and the output light level of each optical amplifier section is controlled to a constant level by respective control circuits and multiplexed in a multiplexer. At this time, in the demultiplexer, the bandwidth of the signal light output from each of the output ports is designed to have a different value, so that inter-wavelength deviation in the optical output level that occurs in each of the optical amplifier sections, falls within a preset range. Moreover, the constant output control of each control circuit is performed by individually adjusting the gain of each of the optical amplifier sections in relation to fluctuations in the power level without channel number changes of the WDM signal light input to the demultiplexer. As a result, deviation in the optical output level over the entire wavelength bandwidth of the WDM signal light for fluctuations in the input level of the WDM signal light, can be suppressed to a minimum, with a simple configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.