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

Pulka, J. and Piwonski, T. and Huyet, G. and Houlihan, John and Barbay, S. and Martinez, A. and Merghem, K. and Lemaitre, A. and Ramdane, A. and Kuszelewicz, R. (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.

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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 similar to 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:	ISI Document Delivery No.: 801CY Times Cited: 1 Cited Reference Count: 25 Pulka, Jaroslaw Piwonski, Tomasz Huyet, Guillaume Houlihan, John Barbay, Sylvain Martinez, Anthony Merghem, Kamel Lemaitre, Aristide Ramdane, Abderrahim Kuszelewicz, Robert Science Foundation Ireland [07/SRC/I1173, SFI 07/IN.1/I929]; Irish Government; Institute of Technology Ireland; bilateral French-Irish cooperation program Ulysses 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. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PISCATAWAY
Uncontrolled Keywords:	Optical amplifiers optical materials semiconductor device measurements LINEWIDTH ENHANCEMENT FACTOR LASERS NONLINEARITIES TEMPERATURE ROOM
Departments or Groups:	Optics Research Group
Divisions:	School of Science > Department of Computing, Maths and Physics
Depositing User:	John Houlihan
Date Deposited:	20 Nov 2012 11:06
Last Modified:	22 Aug 2016 10:26
URI:	http://repository-testing.wit.ie/id/eprint/2006

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