Determining the linewidth enhancement factor via optical feedback in quantum dot micropillar lasers

• Published in: Optics express Vol. 26; no. 24; p. 31363
• Main Authors: Holzinger, Steffen, Kreinberg, Sören, Hokr, Brett H., Schneider, Christian, Höfling, Sven, Chow, Weng W., Porte, Xavier, Reitzenstein, Stephan
• Format: Journal Article
• Language: English
• Published: United States Optical Society of America 26.11.2018

The linewidth enhancement factor α is a key parameter determining the spectral and dynamical behavior of semiconductor lasers. Here, we propose and demonstrate a method for determining this parameter based on a direct measurement of variations in the laser gain and emission spectrum when subject to...