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Ultrafast Gain and Refractive Index Dynamics in AlInAs/AlGaAs Quantum Dot Based Semiconductor Optical Amplifiers Operating at 800 nm

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10 Author(s)

The ultrafast gain and refractive index dynamics in AlInAs/AlGaAs quantum dot (QD) based semiconductor optical amplifiers is reported. Measurements in the forward bias regime indicate a complete gain recovery timescale of ~ 5 ps , while the phase dynamics occur over a much longer timescale. At increased pump powers, the impact of nonresonant carriers created by two-photon absorption is visible as an increased injection in both gain and phase dynamics. Reverse-biased measurements reveal a similar behavior to previous measurements on InAs QD devices.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:47 ,  Issue: 8 )

Date of Publication:

Aug. 2011

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