Piwonski, T. and O'Driscoll, I. and Houlihan, J. and Huyet, G. and Manning, R. J. and Corbett, B. (2008) Gain and phase dynamics of InAs/GaAs quantum dot semiconductor optical amplifiers. In: Proceedings of 2008 10th Anniversary International Conference on Transparent Optical Networks, ICTON :. Proceedings of 2008 10th Anniversary International Conference on Transparent Optical Networks, ICTON . UNSPECIFIED, GRC, pp. 145-148. ISBN 9781424426256
Full text not available from this repository. (Request a copy)Abstract
Ultrafast spectroscopy of quantum dot semiconductor optical amplifiers (SOAs) provides valuable information about the potential of these devices for emerging applications such as multi-wavelength regeneration while giving insight on their unique carrier dynamics. Pump-probe spectroscopy was used to analyse the carrier dynamics in InAs/GaAs quantum dot amplifiers. We have developed a "two-colour" experimental configuration that allows us to pump and probe different parts of the Amplified Spontaneous Emission spectrum and develop a detailed picture of the relevant carrier processes in both absorption and gain regimes of QD-SOAs. The study has revealed that hole recovery and intradot electron relaxation occur on a picosecond timescale, while the electron capture time is on the order of 10 ps. The relaxation of the wetting layer carrier density was 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. Such behaviour is strongly encouraging for reduced pattern effect operation in high speed optical networks.
Item Type: | Book Section |
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Uncontrolled Keywords: | /dk/atira/pure/subjectarea/asjc/1700/1705 |
Departments or Groups: | |
Depositing User: | Admin SSL |
Date Deposited: | 19 Oct 2022 23:14 |
Last Modified: | 21 Jun 2023 22:05 |
URI: | http://repository-testing.wit.ie/id/eprint/4824 |
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