RF injection of THz QCL combs at 80 K emitting over 700 GHz spectral bandwidth

Open access
Date
2020-03Type
- Journal Article
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Abstract
We report about RF injection locking of an homogeneous THz quantum cascade laser operating at 3 THz central frequency. The extremely diagonal nature of the optical transition, combined with low-loss copper-based double-metal waveguides, allow CW operation up to 105 K and CW power in excess of 5.6 mW measured at 80 K. Terahertz emission spanning up to 600 GHz, together with a narrow beatnote, indicate comb operation at 80 K, and strong RF injection clearly modifies the laser spectrum up to 700 GHz spectral bandwidth making these devices ideal candidates for an on-chip dual comb spectrometer. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000406661Publication status
publishedExternal links
Journal / series
PhotonicsVolume
Pages / Article No.
Publisher
MDPISubject
THz QCL; frequency comb; RF injection; broadbandOrganisational unit
03759 - Faist, Jérôme / Faist, Jérôme
03759 - Faist, Jérôme / Faist, Jérôme
03759 - Faist, Jérôme / Faist, Jérôme
Funding
165639 - Monolithic, self referenced quantum cascade laser frequency comb (SNF)
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Citations
Cited null times in
Web of Science
Cited 3 times in
Scopus
ETH Bibliography
yes
Altmetrics