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Ultrafast gain and index dynamics of quantum dash structures emitting at
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Small signal SOA gain at three different wavelengths. The ASE spectrum of the device at bias current from in steps of is shown in the inset.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Gain and phase recovery of Qdash SOA for the bias currents of 45, 75, 100, and at a fixed wavelength of . (b) Fast and slow recovery times from biexponential fit to gain and phase recovery traces.

Image of FIG. 3.
FIG. 3.

(Color online) Characteristic gain recovery times of Qdash SOA (upper panel) as function of wavelength and relative amplitude of fast component to total gain recovery as function of wavelength in SOA (lower panel). Current is fixed at . The lines are guides to the eyes.

Image of FIG. 4.
FIG. 4.

(Color online) Comparison of Qdash and Qdot SOA pump-probe traces. Both devices are electrically pumped to be high in the gain regime and they are probed at their respective gain maxima. Upper panel: Gain recovery. Qdot trace has been scaled to same gain compression at zero pump-probe delay. Lower panel: Phase recovery.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ultrafast gain and index dynamics of quantum dash structures emitting at 1.55μm