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Conference Paper
Conference on Lasers and Electro-Optics
San Jose, California United States
May 4-9, 2008
ISBN: 978-1-55752-859-9
THz QCL II (CMFF)

Spectral Gain Narrowing in THz Quantum Cascade Lasers above Laser Threshold Using THz-Time Domain Spectroscopy

Nathan Jukam, Sukhdeep S. Dhillon, Dimitri Oustinov, Zhen-Yu Zhao, Sophie Hameau, Stefano Barbieri, Pascal Filloux, Xavier Marcadet, Carlo Sirtori, and Jerome Tignon

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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.

© 2008 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

Citation
N. Jukam, S. S. Dhillon, D. Oustinov, Z. Zhao, S. Hameau, S. Barbieri, P. Filloux, X. Marcadet, C. Sirtori, and J. Tignon, "Spectral Gain Narrowing in THz Quantum Cascade Lasers above Laser Threshold Using THz-Time Domain Spectroscopy," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, OSA Technical Digest (CD) (Optical Society of America, 2008), paper CMFF2.
http://www.opticsinfobase.org/abstract.cfm?URI=CLEO-2008-CMFF2


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