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Proceedings Paper

THz QCLs for heterodyne receivers and wavelength modulation spectroscopy
Author(s): Alan W. M. Lee; Tsung-Yu Kao; Ian A. Zimmerman; William T. S. Cole; Richard Thurston; Richard J. Saykally; Ningren Han; Qing Hu
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Paper Abstract

Milliwatt average power terahertz quantum cascade lasers (THz-QCLs, 2 THz to 5 THz) have been developed for spectroscopy and as local oscillators for heterodyne receivers. Novel DFB THz-QCLs have been fabricated and show single-mode operation. The narrow line widths of <10 MHz and stark shift tuning of of 6 GHz, allows for wavelength modulation spectroscopy of low pressure gasses in the unexplored THz frequency band. The same devices also act as local-oscillators for heterodyne receivers for remote-sensing and astronomy. Lastly we report on improved tunable DFB devices for use in spectroscopy.

Paper Details

Date Published: 25 May 2016
PDF: 10 pages
Proc. SPIE 9836, Micro- and Nanotechnology Sensors, Systems, and Applications VIII, 98362O (25 May 2016); doi: 10.1117/12.2224158
Show Author Affiliations
Alan W. M. Lee, LongWave Photonics LLC (United States)
Tsung-Yu Kao, LongWave Photonics LLC (United States)
Ian A. Zimmerman, LongWave Photonics LLC (United States)
William T. S. Cole, Univ. of California, Berkeley (United States)
Richard Thurston, Univ. of California, Berkeley (United States)
Richard J. Saykally, Univ. of California, Berkeley (United States)
Ningren Han, Massachusetts Institute of Technology (United States)
Qing Hu, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 9836:
Micro- and Nanotechnology Sensors, Systems, and Applications VIII
Thomas George; Achyut K. Dutta; M. Saif Islam, Editor(s)

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