Ultrafast gain dynamics in InAs-InGaAs quantum-dot amplifiers
Journal
IEEE Photonics Technology Letters
Journal Volume
12
Journal Issue
6
Pages
594-596
Date Issued
2000
Author(s)
Abstract
The ultrafast dynamics of gain and refractive index in an electrically pumped InAs-InGaAs quantum-dot (QD) optical amplifier are measured at room temperature using differential transmission with femtosecond time resolution. Both absorption and gain regions are investigated. While the absorption bleaching recovery occurs on a picosecond time scale, the gain compression recovers with /spl sim/100-fs time constant, making devices based on such dots promising for high-speed optical communications.
SDGs
Type
journal article