Ultrafast gain and refractive index dynamics in AlInAs/AlGaAs quantum dot based semiconductor optical amplifiers operating at 800 nm

Pulka, Jaroslaw and Piwonski, Tomasz and Huyet, Guillaume and Houlihan, John and Barbay, Sylvain and Martinez, Anthony and Merghem, Kamel and Lemaitre, Aristide and Ramdane, Abderrahim and Kuszelewicz, Robert (2011) Ultrafast gain and refractive index dynamics in AlInAs/AlGaAs quantum dot based semiconductor optical amplifiers operating at 800 nm. IEEE Journal of Quantum Electronics, 47 (8). pp. 1094-1100. ISSN 0018-9197

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Abstract

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.

Item Type:	Article
Additional Information:	Funding Information: Manuscript received February 9, 2011; revised April 27, 2011; accepted May 6, 2011. Date of current version June 28, 2011. This work was supported in part by the Science Foundation Ireland under Grant 07/SRC/I1173 and Grant SFI 07/IN.1/I929; the Innovation in Science Pursuit for Inspired Research Program funded by the Irish Government’s Program for Research in Third Level Institutions, Cycle 4, National Development Plan 2007–2013; and the Institute of Technology Ireland funding under the Technological Sector Research Strand 1 Program. The works of S. Barbay and A. Martinez were supported in part by the bilateral French–Irish cooperation program Ulysses.
Uncontrolled Keywords:	/dk/atira/pure/subjectarea/asjc/3100/3107
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Depositing User:	Admin SSL
Date Deposited:	19 Oct 2022 23:07
Last Modified:	07 Jun 2023 18:44
URI:	http://repository-testing.wit.ie/id/eprint/4145

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