Ultrafast gain dynamics in InAs-InGaAs quantum-dot amplifiers

Borri, Paola ORCID: https://orcid.org/0000-0002-7873-3314, Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, Hvam, J. M., Heinrichsdorff, F., Mao, M.-H. and Bimberg, D. 2000. Ultrafast gain dynamics in InAs-InGaAs quantum-dot amplifiers. IEEE Photonics Technology Letters 12 (6) , pp. 594-596. 10.1109/68.849054

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Abstract

The ultrafast dynamics of gain and refractive index in an electrically pumped InAs-InGaAs quantum-dot (QD) optical amplifier are measured at room temperature using differential transmission with femtosecond time resolution. Both absorption and gain regions are investigated. While the absorption bleaching recovery occurs on a picosecond time scale, the gain compression recovers with /spl sim/100-fs time constant, making devices based on such dots promising for high-speed optical communications.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy Biosciences
Subjects:	Q Science > QC Physics
Uncontrolled Keywords:	Amplifiers; modulators; quantum-dot lasers; ultrafast optics
Publisher:	IEEE
ISSN:	1041-1135
Last Modified:	25 Oct 2022 09:47
URI:	https://orca.cardiff.ac.uk/id/eprint/60015

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