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Proceedings Paper

Controlling QCLs for frequency metrology from the infrared to the THz range
Author(s): Luigi Consolino; Francesco Cappelli; Michele De Regis; Giulio Campo; Iacopo Galli; Davide Mazzotti; Pablo Cancio ; Simone Borri; Giovanni Giusfredi; Saverio Bartalini; Paolo De Natale
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Paper Abstract

The Quantum Cascade Laser is becoming a key tool for plenty of applications, from the IR to the THz range. Progress in nearby areas, such as the development of ultra-low loss crystalline microresonators, optical frequency standards and optical fiber networks for time&frequency dissemination, are paving the way to unprecedented applications in many fields. For the most demanding applications, a thorough control of quantum cascade lasers (QCLs) emission must be achieved. In the last few years, QCLs unique spectral features have been unveiled, while multifrequency, comb-like 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. In our group, we are combining crystalline microresonators, with a combined high quality factor in the infrared and ultra-broadband spectral coverage, with QCLs and other nonlinear highly coherent and frequency referenced sources. Frequency referencing to optical fiber-distributed optical primary standards offers astonishing stability values of 10-16 @1-sec timescales in laboratory environments but several hundred kilometres far away from the primary clocks. A review will be given of the present status of research in this field, with a view to perspectives and future applications.

Paper Details

Date Published: 26 January 2018
PDF: 20 pages
Proc. SPIE 10540, Quantum Sensing and Nano Electronics and Photonics XV, 105401I (26 January 2018); doi: 10.1117/12.2283226
Show Author Affiliations
Luigi Consolino, Istituto Nazionale di Ottica-CNR (Italy)
Francesco Cappelli, Istituto Nazionale di Ottica-CNR (Italy)
Michele De Regis, Istituto Nazionale di Ottica-CNR (Italy)
Giulio Campo, Istituto Nazionale di Ottica-CNR (Italy)
Iacopo Galli, Istituto Nazionale di Ottica-CNR (Italy)
Davide Mazzotti, Istituto Nazionale di Ottica-CNR (Italy)
Pablo Cancio , Istituto Nazionale di Ottica-CNR (Italy)
Simone Borri, Istituto Nazionale di Ottica-CNR (Italy)
Giovanni Giusfredi, Istituto Nazionale di Ottica-CNR (Italy)
Saverio Bartalini, Istituto Nazionale di Ottica-CNR (Italy)
Paolo De Natale, Istituto Nazionale di Ottica-CNR (Italy)

Published in SPIE Proceedings Vol. 10540:
Quantum Sensing and Nano Electronics and Photonics XV
Manijeh Razeghi; Gail J. Brown; Jay S. Lewis; Giuseppe Leo, Editor(s)

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