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


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
Issue number13
StatePublished - 27 Sep 2010
Externally publishedYes

Bibliographical note

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


Dive into the research topics of 'A nearly instantaneous gain response in quantum dash based optical amplifiers'. Together they form a unique fingerprint.

Cite this