Title :
Equalization in amplified WDM lightwave transmission systems
Author :
Chraplyvy, A.R. ; Nagel, J.A. ; Tkach, R.W.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
The authors introduce simple techniques to solve gain equalization problems in amplified wavelength-multiplexed lightwave transmission systems. By adjusting the channel powers at the terminals in a prescribed way, either the output powers or the output signal-to-noise ratios of all the channels can be equalized. All adjustments can be made using information provided by system telemetry. No new equipment, upgrades, or adjustments are required at intermediate amplifier sites.<>
Keywords :
frequency division multiplexing; optical links; amplified WDM lightwave transmission systems; amplified wavelength-multiplexed lightwave transmission systems; channel equalisation; channel powers; gain equalization problems; output powers; output signal-to-noise ratios; system telemetry; Erbium-doped fiber amplifier; Optical amplifiers; Optical attenuators; Optical filters; Optical noise; Optical pumping; Optical saturation; Optical transmitters; Stimulated emission; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
