Ultrafast gain dynamics in InAs-InGaAs quantum-dot amplifiers

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 blea...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 12; no. 6; pp. 594 - 596
Main Authors Borri, P., Langbein, W., Hvam, J.M., Heinrichsdorff, F., Mao, M.-H., Bimberg, D.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2000
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Absorption
Amplification
Amplifiers
Devices
Dynamics
Femtosecond
Gain
High speed optical techniques
Optical amplifiers
Optical pumping
Optical refraction
Photonics
Quantum dots
Refractive index
Stimulated emission
Temperature measurement
Ultrafast optics
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Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1041-1135
1941-0174
DOI:10.1109/68.849054