Electronics Letters · 1988 · 32 citations · 6 references
EngineeringCommunicationElectrical EngineeringOptoelectronicsPhotonicsSemiconductor DevicesDistortion AnalysisFiber-optic CommunicationNonlinear OpticsOptical AmplifiersOptical Communication SystemsOptical ModulationDistortion ReductionIntermodulation DistortionLinearity EnhancementNonlinear Effects In Optical AmplifiersOptical NonlinearityOptical Nonlinearity CompensationPredistortion LinearizationSemiconductor Optical Amplifiers
The nonlinearity inherent in semiconductor optical amplifiers can cause adverse system effects, such as intermodulation distortion (IMD) in FDM systems, crosstalk in on/off-keying WDM systems, and pulse distortion in multi-Gbit/s on/offkeying systems. We present a practical, feed-forward linearisation scheme that is capable of reducing these effects significantly. A two-tone experiment confirms the reduction of the IMD by about 14 dB.
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