Extensive study of the linewidth enhancement factor of a distributed feedback quantum cascade laser at ultra-low temperature

• Published in: Proceedings of SPIE, the international society for optical engineering Vol. 10926; pp. 1092619 - 1092619-10
• Main Authors: Spitz, O, Herdt, A, Duan, J, Carras, M, Elsässer, W, Grillot, F
• Format: Conference Proceeding Journal Article
• Language: English
• Published: SPIE 21.02.2019; SPIE, The International Society for Optical Engineering
• Series: Quantum Sensing and Nano Electronics and Photonics XVI
• Subjects: Engineering Sciences; Optics; Photonic; Linewidth enhancement factor; Alpha factor; Quantum cascade lasers; Mid-infrared photonics

Quantum cascade lasers (QCLs) are optical sources exploiting radiative intersubband transitions within the conduction band of semiconductor heterostructures.1 The opportunity given by the broad span of wavelengths that QCLs can achieve, from mid-infrared to terahertz, leads to a wide number of appli...