Title :
Linewidth enhancement factor of a THz quantum cascade laser
Author :
Green, Richard P. ; Xu, Ji-Hua ; Mahler, Lukas ; Tredicucci, Alessandro ; Giuliani, Guido ; Beere, Harvey E. ; Ritchie, David A.
Author_Institution :
NEST/INFM & Scuola Normale Superiore, Pisa
Abstract :
We have used an optical self-mixing technique to measure the linewidth enhancement factor of a terahertz quantum cascade laser. We find that contrary to previous predictions of a zero linewidth enhancement factor, it has a value of ~0.5.
Keywords :
quantum cascade lasers; submillimetre wave lasers; THz quantum cascade laser; linewidth enhancement; optical self-mixing technique; terahertz quantum cascade laser; Laser feedback; Laser noise; Laser transitions; Mirrors; Optical feedback; Optical mixing; Optical refraction; Optical waveguides; Quantum cascade lasers; Stimulated emission; Quantum cascade laser; intersubband;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516807
