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Ultrafast gain dynamics in InAs-InGaAs quantum-dot amplifiers

Borri, Paola, Langbein, Wolfgang Werner, 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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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
Subjects: Q Science > QC Physics
Uncontrolled Keywords: Amplifiers; modulators; quantum-dot lasers; ultrafast optics
Publisher: IEEE
ISSN: 1041-1135
Last Modified: 15 Apr 2020 13:14

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