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
Saykally, Richard J.
Han, Ningren
Hu, Qing
Date Issued
April 2016
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
Version
Final published version
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
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1117/12.2224158
