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Proceedings Paper

Modeling of multiple quantum well lasers and study of the coupling effects between wells
Author(s): Alberto de Deus Sarmento
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Paper Abstract

The coupling effects between quantum wells (QWs) on the small-signal response of unstrained multiple QWs (MQWs) are studied theoretically in a two-band-model approximation. A finite- well model and flat-band conditions were assumed. For any barrier thickness between QWs the gain spectrum showed many peaks located at heavy-hole and light-hole transitions. Therefore, the lasers under investigation are being treated as multiple-level systems. It has been shown that the dependence of this peak is a function of the barrier thickness. The traditional rate equations were reformulated and solved for the intensity modulation response. Results and discussion for the characteristics referred above of a GaInAsP-InP double quantum well laser are presented as a specific example. We conclude that, in contrast to the common belief, the coupling effects can enhance the modulation characteristics under certain conditions.

Paper Details

Date Published: 19 April 1996
PDF: 9 pages
Proc. SPIE 2694, Quantum Well and Superlattice Physics VI, (19 April 1996); doi: 10.1117/12.238404
Show Author Affiliations
Alberto de Deus Sarmento, Instituto Superior Tecnico (Portugal)

Published in SPIE Proceedings Vol. 2694:
Quantum Well and Superlattice Physics VI
Gottfried H. Doehler; Theodore S. Moise, Editor(s)

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