25 May 2016 THz QCLs for heterodyne receivers and wavelength modulation spectroscopy
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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.
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Alan W. M. Lee, Alan W. M. Lee, Tsung-Yu Kao, Tsung-Yu Kao, Ian A. Zimmerman, Ian A. Zimmerman, William T. S. Cole, William T. S. Cole, Richard Thurston, Richard Thurston, Richard J. Saykally, Richard J. Saykally, Ningren Han, Ningren Han, Qing Hu, Qing Hu, } "THz QCLs for heterodyne receivers and wavelength modulation spectroscopy", Proc. SPIE 9836, Micro- and Nanotechnology Sensors, Systems, and Applications VIII, 98362O (25 May 2016); doi: 10.1117/12.2224158; https://doi.org/10.1117/12.2224158
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