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Microcavity Saturable absorber is used for phase-preserving amplitude regeneration of RZ-DQPSK signals. The regenerator is assessed in a 28 Gbaud recirculating loop showing system tolerance to nonlinear phase noise and distance improvement.
A new multiple-quantum-well saturable absorber (SA) device allowing power stabilization is described. Combined with the classical SA achieving extinction ratio improvement, it allows all-optical amplitude-shift-keying 2R signal regeneration. Furthermore its phase-preserving characteristics make it potentially useful to prevent phase noise accumulation in RZ DPSK signals.
We investigate the cascadability of a microcavity-saturable-absorber-based phase-preserving amplitude regenerator for RZ-DPSK signals. The results show that the tolerance of phase-encoded signals to nonlinear phase noise is increased. A distance improvement ratio up to 1.6 is experimentally demonstrated.
We experimentally investigate a new generation of multiple-quantum-well semiconductor saturable absorber for all-optical phase-shift-keying signal regeneration. The device under study exhibits a reflectivity which decreases when the input signal power increases. This characteristic can be seen as a power limiting function which could be used for phase-preserving amplitude noise reduction, hence preventing...
We experimentally evaluate a novel all-optical phase-preserving amplitude regeneration technique for RZ-DPSK signals using saturable absorber. The device's capacity for amplitude noise reduction, hence preventing from nonlinear phase noise accumulation is demonstrated at 42.7 Gbit/s.
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