Gain control apparatus, optical transmission apparatus, gain control method for optical amplifier, and wavelength multiplex optical transmission system
US7843631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2007 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Mar 25, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to an apparatus for controlling a gain of an optical amplifier, and the apparatus comprises a target gain calculating unit for calculating, as a target gain for an optical amplifier, a value obtained by increasing or decreasing a gain (output) of signal light as the number of wavelengths of wavelength-multiplexed signal light decreases, and a control signal outputting unit for outputting a control signal to the optical amplifier so as to amplify the wavelength-multiplexed signal light with the target gain calculated by the target gain calculating unit. This promptly suppresses a fluctuation of signal light level, particularly, a fluctuation of output light power of an optical amplifier stemming from a variation of the number of wavelengths of wavelength-multiplexed signal light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.