Phase analysis and full phase control of chip-scale infrared frequency combs

Luigi Consolino; Francesco Cappelli; Pablo Cancio; Iacopo Galli; Davide Mazzotti; Saverio Bartalini; Paolo De Natale

doi:10.1117/12.2545641

24 February 2020 Phase analysis and full phase control of chip-scale infrared frequency combs

Luigi Consolino, Francesco Cappelli, Pablo Cancio, Iacopo Galli, Davide Mazzotti, Saverio Bartalini, Paolo De Natale

Proceedings Volume 11301, Novel In-Plane Semiconductor Lasers XIX; 1130119 (2020) https://doi.org/10.1117/12.2545641
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

The road towards the realization of quantum cascade laser (QCL) frequency combs (QCL-combs) has undoubtedly attracted ubiquitous attention from the scientific community, as these devices promise to deliver all-in-one (i.e. a single, miniature, active devices) frequency comb (FC) synthesizers in a range as wide as QCL spectral coverage itself (from about 4 microns to the THz range), with the unique possibility to tailor their spectral emission by band structure engineering. For these reasons, vigorous efforts have been spent to characterize the emission of four-wave-mixing multifrequency devices, aiming to seize their functioning mechanisms. However, up to now, all the reported studies focused on free-running QCL-combs, eluding the fundamental ingredient that turns a FC into a useful metrological tool. For the first time we have combined mode-locked multi-frequency QCL emitters with full phase stabilization and independent control of the two FC degrees of freedom. At the same time, we have introduced the Fourier transform analysis of comb emission (FACE) technique, used for measuring and simultaneously monitoring the Fourier phases of the QCL-comb modes. The demonstration of tailored-emission, miniaturized, electrically-driven, mid-infrared/THz coverage, fully stabilized and fully-controlled QCL-combs finally enables this technology for metrological-grade applications triggering a new scientific leap affecting several fields ranging from everyday life to frontier-research.

Conference Presentation

Citation Download Citation

Luigi Consolino, Francesco Cappelli, Pablo Cancio, Iacopo Galli, Davide Mazzotti, Saverio Bartalini, and Paolo De Natale "Phase analysis and full phase control of chip-scale infrared frequency combs", Proc. SPIE 11301, Novel In-Plane Semiconductor Lasers XIX, 1130119 (24 February 2020); https://doi.org/10.1117/12.2545641

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