THz QCLs for heterodyne receivers and wavelength modulation spectroscopy
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 tun...
Main Authors: | , , , , , , , |
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Other Authors: | |
Format: | Article |
Language: | en_US |
Published: |
SPIE
2018
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Online Access: | http://hdl.handle.net/1721.1/116153 https://orcid.org/0000-0003-4513-8575 https://orcid.org/0000-0003-1982-4053 |
Summary: | 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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