Electronics Letters · 1989 · 120 citations · 0 references
EngineeringElectrical EngineeringOpticsOptoelectronicsPhotonicsFiber OpticsOptical AmplifiersOptical Communication SystemsOptical FibersOptical Properties Of MaterialsOptical SourcesErbium-doped Fiber AmplifiersExcited-state AbsorptionNonlinear AbsorptionOptical AmplificationOptical Gain MaterialsRare-earth-doped AmplifiersRare-earth-doped Fibers
By choosing pump wavelengths at which excited state absorption does not occur, efficient high gain operation of erbium-doped fibre amplifiers is possible. Practical pump wavelengths of 532 nm and 980 nm are identified as optimal, giving gains as high as 1.35dB/mW and 2.2dB/mW of pump at the two wavelengths, respectively.