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1 April 2022 Terahertz frequency combs from dispersion compensated and RF injection locked quantum cascade ring lasers
Paolo Micheletti, Urban Senica, Andres Forrer, Mattias Beck, Jérôme Faist, Giacomo Scalari
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Proceedings Volume PC11987, Laser Resonators, Microresonators, and Beam Control XXIV; PC1198701 (2022) https://doi.org/10.1117/12.2609479
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
We report frequency combs formation in THz QCL ring cavities. The double metal waveguide laser is encapsulated in benzocyclobutene (BCB) on which the top contact is deposited. This allows to explore alternative designs such as ultrathin ring cavities and coupled double ring waveguides avoiding issues with the electrical connection of the. Ring laser operating in dense comb regime with spectral bandwidth of ~500 GHz is here reported. In addition to the frequency comb operation sech2-shaped spectra are observed in RF-injected ring lasers and dispersion compensated double ring cavities, hinting at the existence of soliton regimes in the QCL.
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Paolo Micheletti, Urban Senica, Andres Forrer, Mattias Beck, Jérôme Faist, and Giacomo Scalari "Terahertz frequency combs from dispersion compensated and RF injection locked quantum cascade ring lasers", Proc. SPIE PC11987, Laser Resonators, Microresonators, and Beam Control XXIV, PC1198701 (1 April 2022); https://doi.org/10.1117/12.2609479
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KEYWORDS
Quantum cascade lasers
Frequency combs
Dispersion
Waveguides
Metals
RF coupling
Solitons
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