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Nonlinear polarization rotation induced by ultrashort optical pulses in a semiconductor optical amplifier

“…5. We find that the amplification and phase shifts are in good agreement with the experimental results in [20] for a TE polarized, 0.5 pJ pump pulse. In Fig.…”

“…Moreover, we want to remark that we have modeled the phase-change by using a constant linewidth enhancement factor that is defined in the usual way [8,20]. Although this ignores dispersive effects due to strong variations in the carrier-density, such a treatment leads to result that are in agreement with experimental results.…”

All-Optical Switching and Wavelength Conversion Based on Ultrafast Nonlinearities in Semiconductor Optical Amplifiers

“…58) Moreover, we want to remark that we have modeled the phase-change by using a constant linewidth enhancement factor that is defined in the usual way. 54,56) Although this ignores dispersive effects due to strong variations in the carrier-density, such a treatment leads to result that are in agreement with experimental results.…”

“…54,55) When the pulse duration is as short as 50-100 fs we can no longer expect good agreement between our model and measurements. However, in view of the apparently successful application of earlier models for pulses as short as 200 fs, we expect that the present model should be applicable for pulses of the same duration, especially when the central pulse frequency coincides with the gain maximum.…”

All-Optical Logic Based on Ultrafast Gain and Index Dynamics in a Semiconductor Optical Amplifier

“…For the energy relaxation, the temperature must be taken equal to the lattice temperature 300 K . We are aware of the fact that neglecting the gain and group velocity dispersion in our model for pulse propagation in an SOA limits the applicability of our model [53], [54]. When the pulse duration is as short as 50-100 fs, we can no longer expect good agreement between our model and measurements.…”