Scientific Results

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. ©2018 Luigi Consolino et al., published by De Gruyter, Berlin/Boston 2018.


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:;
-European Commission H2020 Laserlab-Europe Project [654148], FET Open – ULTRAQCL Project [665158], Funder Id:, \”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: 24
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