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" THz QCLs for heterodyne receivers and wavelength modulation spectroscopy "
Lee, AWMKao, TYZimmerman, IACole, WTSThurston, RSaykally, RJHan, NHu, Q
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AL
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900893
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LA3nf1s2zn
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THz QCLs for heterodyne receivers and wavelength modulation spectroscopy [Article]\ Lee, AWMKao, TYZimmerman, IACole, WTSThurston, RSaykally, RJHan, NHu, Q
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2016
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UC Berkeley
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© 2016 SPIE. 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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