Absorption recovery in strongly saturated quantum-well electroabsorption modulators

Sune Højfeldt, F. Romstad, Jesper Mørk

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Abstract

We observe experimentally that a quantum-well electroabsorption modulator, when strongly saturated by a highly energetic optical pulse, may exhibit an absorption recovery time much longer than for excitation with a low-energy pulse. Using a comprehensive drift-diffusion. type model, we are able to explain this effect theoretically. The. prolongation of the absorption recovery is induced by carrier distribution effects, not by field-induced changes in the dynamical transport parameters such as the time carriers take to escape from the wells.
Original languageEnglish
JournalI E E E Photonics Technology Letters
Volume15
Issue number5
Pages (from-to)676-678
ISSN1041-1135
DOIs
Publication statusPublished - 2003

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