Phase dynamics of InAs/GaAs quantum dot semiconductor optical amplifiers

I. O'Driscoll, T. Piwonski, J. Houlihan, G. Huyet, R. J. Manning, B. Corbett

Research output: Contribution to journalArticlepeer-review

Abstract

The gain and phase dynamics of InAs/GaAs quantum dot amplifiers are studied using single and two-color heterodyne pump probe spectroscopy. The relaxation of the wetting layer carrier density is shown to have a strong effect on the phase dynamics of both ground and excited state transients, while having a much weaker effect on the gain dynamics. In addition, the dynamical alpha factor may also display a constant value after an initial transient. Such behavior is strongly encouraging for reduced pattern effect operation in high speed optical networks. (c) 2007 American Institute of Physics.
Original languageEnglish
Pages (from-to)3
JournalApplied Physics Letters
Volume91
Issue number26
Publication statusPublished - 2007

Keywords

  • LINEWIDTH ENHANCEMENT FACTOR LASERS ALPHA GAIN

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