Differential Gain and Gain Compression in Quantum-Dot Lasers

The dynamics of optical gain in semiconductor quantum dots (QDs) is investigated. Simple analytical expressions are derived, which directly connect the laser dynamical response to capture and intradot relaxation rates. The effect of hole spreading in the valence band and spectral hole burning in the...

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Bibliographic Details
Published inIEEE journal of quantum electronics Vol. 43; no. 4; pp. 287 - 294
Main Authors Fiore, A., Markus, A.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.04.2007
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Atomic beams
Bandwidth
Compressing
Differential gain
Dynamic tests
Dynamics
Energy states
Gain
gain compression
Laser feedback
Laser theory
Lasers
Optical materials
Quantum dot lasers
Quantum dots
quantum dots (QDs)
Quantum well lasers
Semiconductor lasers
Semiconductor nanostructures
Semiconductors
Spectra
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Summary:The dynamics of optical gain in semiconductor quantum dots (QDs) is investigated. Simple analytical expressions are derived, which directly connect the laser dynamical response to capture and intradot relaxation rates. The effect of hole spreading in the valence band and spectral hole burning in the QD ensemble is also quantitatively assessed. The analysis shows that intradot relaxation constitutes the main limitation in the dynamics and points to possible routes towards the improvement of QD lasers
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2006.890399