Fully phase-stabilized quantum cascade laser frequency comb
Authors: Consolino L., Nafa M., Cappelli F., Garrasi K., Mezzapesa FP., Li LH., Davies AG., Linfield EH., Vitiello MS., De Natale P., Bartalini S.
Autors Affiliation: CNR, Ist Nazl Ott & LENS, Via N Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; CNR, Ist Nanosci, NEST, Piazza S Silvestro 12, I-56127 Pisa, Italy; Scuola Normale Super Pisa, Piazza S Silvestro 12, I-56127 Pisa, Italy; Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England; PpqSense Srl, Via Gattinella 20, I-50013 Campi Bisenzio, FI, Italy
Abstract: Miniaturized frequency comb sources across hard-to-access spectral regions, i.e. mid-and far-infrared, have long been sought. Four-wave-mixing based Quantum Cascade Laser combs (QCL-combs) are ideal candidates, in this respect, due to the unique possibility to tailor their spectral emission by proper nanoscale design of the quantum wells. We demonstrate full-phase-stabilization of a QCL-comb against the primary frequency standard, proving independent and simultaneous control of the two comb degrees of freedom (modes spacing and frequency offset) at a metrological level. Each emitted mode exhibits a sub-Hz relative frequency stability, while a correlation analysis on the modal phases confirms the high degree of coherence in the device emission, over different power-cycles and over different days. The achievement of fully controlled, phase-stabilized QCL-comb emitters proves that this technology is mature for metrological-grade uses, as well as for an increasing number of scientific and technological applications.
Journal/Review: NATURE COMMUNICATIONS
Volume: 10 Pages from: 2938-1 to: 2938-7
KeyWords: quantum cascade laserDOI: 10.1038/s41467-019-10913-7Citations: 20data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-02-28References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here