A nearly instantaneous gain response in quantum dash based optical amplifiers

A. Capua*, G. Eisenstein, J. P. Reithmaier

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We describe a unique phenomenon occurring in InAs/InP quantum dash amplifiers: a nearly instantaneous gain response taking place across the entire inhomogeneously broadened gain spectrum. The phenomenon is induced by a 100-150 fs pulse and is observable using multiwavelength pump probe measurements. Large bias levels and an intense pump pulse are imperative for enacting the ultrafast mechanism which is due to a combination of the gain inhomogeneity, nonlinear two photon absorption and the quantum wirelike density of state function.

Original languageAmerican English
Article number131108
JournalApplied Physics Letters
Volume97
Issue number13
DOIs
StatePublished - 27 Sep 2010
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the project “GOSPEL” of the European Commission.

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