Ultrafast gain dynamics in InAs-InGaAs quantum-dot amplifiers

Authors
Borri, P Langbein, W Hvam, JM Heinrichsdorff, E Mao, MH Bimberg, D
Citation
P. Borri et al., Ultrafast gain dynamics in InAs-InGaAs quantum-dot amplifiers, IEEE PHOTON, 12(6), 2000, pp. 594-596
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE PHOTONICS TECHNOLOGY LETTERS
ISSN journal
10411135 → ACNP
Volume
12
Issue
6
Year of publication
2000
Pages
594 - 596
Database
ISI
SICI code
1041-1135(200006)12:6<594:UGDIIQ>2.0.ZU;2-R
Abstract
The ultrafast dynamics of gain and refractive index in an electrically pump ed InAs-InGaAs quantum-dot (QD) optical amplifier are measured at room temp erature using differential transmission with femtosecond time resolution, B oth absorption and gain regions are investigated. While the absorption blea ching recovery occurs on a picosecond time scale, the gain compression reco vers with similar to 100-fs time constant, making devices based on such dot s promising for high-speed optical communications.