Title :
Spectral gain narrowing in THz quantum cascade lasers above laser threshold using THz-time domain spectroscopy
Author :
Jukam, N. ; Dhillon, S. ; Oustinov, D. ; Zhao, Z.-Y. ; Hameau, S. ; Barbieri, S. ; Filloux, P. ; Marcadet, X. ; Sirtori, C. ; Tignon, J.
Author_Institution :
Lab. Pierre Aigrain, Ecole Normale Super., Paris
Abstract :
Terahertz time-domain spectroscopy is used to determine the gain of terahertz quantum-cascade lasers. Gain clamping and spectral gain narrowing are observed above threshold, giving insight into subband alignment as a function of the applied voltage.
Keywords :
quantum cascade lasers; spectroscopic light sources; submillimetre wave spectroscopy; THz quantum cascade lasers; THz-time domain spectroscopy; gain clamping; spectral gain narrowing; Frequency; Gallium arsenide; Optical losses; Optical pulse generation; Optical pulses; Optical sensors; Pulse amplifiers; Quantum cascade lasers; Semiconductor lasers; Spectroscopy; 140.3070 (Infrared and far-infrared lasers); 140.5965 (Semiconductor lasers, quantum cascade);
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
