Spectral phase relation in broadband THz quantum cascade laser frequency combs under strong RF modulation

Andres Forrer; Sara Cibella; Urban Senica; Guido Torrioli; Mattias Beck; Jérôme Faist; Giacomo Scalari

doi:10.1117/12.2608603

5 March 2022 Spectral phase relation in broadband THz quantum cascade laser frequency combs under strong RF modulation

Andres Forrer, Sara Cibella, Urban Senica, Guido Torrioli, Mattias Beck, Jérôme Faist, Giacomo Scalari

Proceedings Volume PC12009, Quantum Sensing and Nano Electronics and Photonics XVIII; PC120090F (2022) https://doi.org/10.1117/12.2608603
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

THz QCLs are promising sources towards achieving octave-spanning comb operation and self-referencing in a monolithic device. We investigate the spectral mode phase relations by means of SWIFT of free running and strongly RF modulated devices. The inspected QCLs are based on an octave-spanning, heterogeneous and a 1.8 THz spanning, homogeneous active region design. The extracted neighboring mode phase differences from SWIFT of free running devices show the FM nature of the comb emission. When strongly RF modulated the spectrum is broadened and both AM and FM states are be observed.

Conference Presentation

Citation Download Citation

Andres Forrer, Sara Cibella, Urban Senica, Guido Torrioli, Mattias Beck, Jérôme Faist, and Giacomo Scalari "Spectral phase relation in broadband THz quantum cascade laser frequency combs under strong RF modulation", Proc. SPIE PC12009, Quantum Sensing and Nano Electronics and Photonics XVIII, PC120090F (5 March 2022); https://doi.org/10.1117/12.2608603

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