QCL-based frequency metrology from the mid-infrared to the THz range: a review

Year: 2019

Authors: Consolino L., Cappelli F., Siciliani De Cumis M., De Natale P.

Autors Affiliation: Istituto Nazionale di Ottica, CNR-INO, Largo E. Fermi, 6, Firenze, 50125, Italy; Agenzia Spaziale Italiana, ASI, Contrada Terlecchia Snc, Matera, Italy

Abstract: Quantum cascade lasers (QCLs) are becoming a key tool for plenty of applications, from the mid-infrared (mid-IR) to the THz range. Progress in related areas, such as the development of ultra-low-loss crystalline microresonators, optical frequency standards, and optical fiber networks for time and frequency dissemination, is paving the way for unprecedented applications in many fields. For most demanding applications, a thorough control of QCLs emission must be achieved. In the last few years, QCLs? unique spectral features have been unveiled, while multifrequency QCLs have been demonstrated. Ultra-narrow frequency linewidths are necessary for metrological applications, ranging from cold molecules interaction and ultra-high sensitivity spectroscopy to infrared/THz metrology. A review of the present status of research in this field is presented, with a view of perspectives and future applications.


Volume: 8 (2)      Pages from: 181  to: 204

More Information: The authors acknowledge financial support by the following:
-Ministero dell´Istruzione, dell´Universita e della Ricerca Project PRIN-2015KEZNYM “NEMO -Non-linear dynamics of optical frequency combs”, Funder Id: http://dx.doi.org/10.13039/501100003407;
-European Commission H2020 Laserlab-Europe Project [654148], FET Open – ULTRAQCL Project [665158], Funder Id: http://dx.doi.org/10.13039/501100000781, “Ultrashort Pulse Generation from Terahertz Quantum Cascade Lasers” and FET Flagship on Quantum Technologies -Qombs Project [820419], “Quantum simulation and entanglement engineering in quantum cascade laser frequency combs”;
-European ESFRI Roadmap “Extreme Light Infrastructure” – ELI Project.

KeyWords: Frequency standards; Infrared devices; Optical fibers, Frequency metrology; Metrological applications; Mid infrared (mid IR); Optical fiber networks; Optical frequency standard; Quantum cascade lasers (QCLs); Time and frequency disseminations; Ultra-high-sensitivity, Quantum cascade lasers
DOI: 10.1515/nanoph-2018-0076

Citations: 44
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