IEEE Photonics Technology Letters · 2015 · 17 citations · 7 references
EngineeringElectrical EngineeringOptoelectronicsPhotonicsSemiconductor MaterialsFiber OpticsNonlinear OpticsOptical AmplifiersOptical Communication SystemsOptical FibersOptical ModulationAmplificationOptical AmplificationOptical Phase ConjugationOptical RegenerationOptical Signal AmplificationPhase ModulationSemiconductor Optical AmplifiersWavelength Conversion
We demonstrate, for the first time, all-optical phase regeneration of a quaternary phase shift keying signal through phase sensitive amplification in nonlinear semiconductor optical amplifiers (SOAs), using a scheme only previously demonstrated in highly nonlinear fibre. We make use of a highly tunable phase quantizing scheme to circumvent some of the limitations imposed by the use of SOAs and show that it may function in either a conjugating or nonconjugating manner.
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