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Harmonic mode-locking of THz quantum cascade lasers (Conference Presentation)
Author(s): Hanond Nong; Feihu Wang; Valentino Pistore; Juliette Mangeney; Jerome Tignon; Sukhdeep Dhillon
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Paper Abstract

Despite their ultrafast dynamics, modelocking of THz QCLs has been shown recently as a robust method to generate short THz pulses with pulse trains as short as ~4ps at a central frequency of ~2.5THz. This opens up applications of QCLs to synthesizer controlled frequency combs as well as operation of QCLs in more exotic modelocked regimes. In this work we demonstrate for the first time harmonic active modelocking of QCLs where pulses are generated at a harmonic of the round trip frequency. This is achieved by active modelocking at the second harmonic of the QCL fundamental round trip frequency, generating a short pulse train with two pulses per round-trip. This realisation potentially allows for higher average power from modelocked QCLs, modulated at multiple harmonics of the fundamental frequency, and is ideally adapted to the QCLs ultrafast dynamics with modulation beyond 60 GHz attainable.

Paper Details

Date Published: 8 March 2019
Proc. SPIE 10926, Quantum Sensing and Nano Electronics and Photonics XVI, 109261F (8 March 2019); doi: 10.1117/12.2507995
Show Author Affiliations
Hanond Nong, Lab. Pierre Aigrain (France)
Feihu Wang, Lab. Pierre Aigrain (France)
Valentino Pistore, Lab. Pierre Aigrain (France)
Juliette Mangeney, Lab. Pierre Aigrain (France)
Jerome Tignon, Lab. Pierre Aigrain (France)
Sukhdeep Dhillon, Lab. Pierre Aigrain (France)

Published in SPIE Proceedings Vol. 10926:
Quantum Sensing and Nano Electronics and Photonics XVI
Manijeh Razeghi, Editor(s)

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