THz QCLs for heterodyne receivers and wavelength modulation spectroscopy

Author(s)
Lee, Alan W. M.; Kao, Tsung-Yu; Zimmerman, Ian A.; Cole, William T. S.; Thurston, Richard; ... Show more
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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. Keywords: terahertz quantum cascade laser, spectroscopy, heterodyne
Date issued
2016-04
URI
http://hdl.handle.net/1721.1/114515
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
Proceedings Volume 9836, Micro- and Nanotechnology Sensors, Systems, and Applications VIII
Publisher
SPIE
Citation
Lee, Alan W. M., et al. "THz QCLs for Heterodyne Receivers and Wavelength Modulation Spectroscopy." Proceedings Volume 9836, Micro- and Nanotechnology Sensors, Systems, and Applications VIII, 17-21 April, 2016, Baltimore, Maryland, edited by Thomas George et al., 2016, p. 98362O. © 2016 SPIE
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