@article{7f55f85a3fac4b279e54b50f50e428d7,
title = "Ultrafast gain and refractive index dynamics in AlInAs/AlGaAs quantum dot based semiconductor optical amplifiers operating at 800 nm",
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.",
keywords = "Optical amplifiers optical materials semiconductor device measurements LINEWIDTH ENHANCEMENT FACTOR LASERS NONLINEARITIES TEMPERATURE ROOM",
author = "Jaroslaw Pulka and Tomasz Piwonski and Guillaume Huyet and John Houlihan and Sylvain Barbay and Anthony Martinez and Kamel Merghem and Aristide Lemaitre and Abderrahim Ramdane and Robert Kuszelewicz",
note = "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{\textquoteright}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.",
year = "2011",
doi = "10.1109/JQE.2011.2155034",
language = "English",
volume = "47",
pages = "1094--1100",
journal = "IEEE Journal of Quantum Electronics",
issn = "0018-9197",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "8",
}