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Proceedings Paper

Phase analysis and full phase control of chip-scale infrared frequency combs
Author(s): Luigi Consolino; Francesco Cappelli; Pablo Cancio; Iacopo Galli; Davide Mazzotti; Saverio Bartalini; Paolo De Natale
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Paper 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.

Paper Details

Date Published: 24 February 2020
PDF: 6 pages
Proc. SPIE 11301, Novel In-Plane Semiconductor Lasers XIX, 1130119 (24 February 2020); doi: 10.1117/12.2545641
Show Author Affiliations
Luigi Consolino, CNR-INO – Istituto Nazionale di Ottica (Italy)
Francesco Cappelli, CNR-INO – Istituto Nazionale di Ottica (Italy)
Pablo Cancio, CNR-INO – Istituto Nazionale di Ottica (Italy)
ppqSense Srl (Italy)
Iacopo Galli, CNR-INO – Istituto Nazionale di Ottica (Italy)
ppqSense Srl (Italy)
Davide Mazzotti, CNR-INO – Istituto Nazionale di Ottica (Italy)
ppqSense Srl (Italy)
Saverio Bartalini, CNR-INO – Istituto Nazionale di Ottica (Italy)
ppqSense Srl (Italy)
Paolo De Natale, CNR-INO – Istituto Nazionale di Ottica (Italy)

Published in SPIE Proceedings Vol. 11301:
Novel In-Plane Semiconductor Lasers XIX
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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