Title :
Differential Gain and Gain Compression in Quantum-Dot Lasers
Author :
Fiore, Andrea ; Markus, Alexander
Author_Institution :
Ecole Polytech. Fed. de Lausanne
fDate :
4/1/2007 12:00:00 AM
Abstract :
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
Keywords :
optical hole burning; quantum dot lasers; differential gain; gain compression; hole spreading; intradot relaxation; laser dynamical response; optical gain dynamics; quantum dot ensemble; quantum-dot lasers; semiconductor quantum dots; spectral hole burning; valence band; Atomic beams; Bandwidth; Energy states; Laser feedback; Laser theory; Optical materials; Quantum dot lasers; Quantum well lasers; Semiconductor lasers; Semiconductor nanostructures; Differential gain; gain compression; quantum dots (QDs); semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2006.890399
