2012 · 59 citations · 1 references
EngineeringElectrical EngineeringOpticsOptoelectronicsPhotonicsFiber OpticsFiber-optic CommunicationOptical AmplifiersOptical Communication SystemsOptical Fiber PropagationOptical FibersErbium-doped Fiber AmplifiersGainNoise FigureNoise Figure AnalysisNoise Figure MeasurementRare-earth-doped Amplifiers
We report and characterize an amplifier which provides gain to a record six spatial modes simultaneously. Two sections of erbium-doped fibre with different mode-dependent gain characteristics are concatenated to equalize gain between modes. The overall gain excursion does not exceed 4dB across all modes. The noise figure is found lower than 7dB.
1