19 April 1996 Modeling of multiple quantum well lasers and study of the coupling effects between wells
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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.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alberto de Deus Sarmento, "Modeling of multiple quantum well lasers and study of the coupling effects between wells", Proc. SPIE 2694, Quantum Well and Superlattice Physics VI, (19 April 1996); doi: 10.1117/12.238404; https://doi.org/10.1117/12.238404


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