Terahertz Frequency Metrology

Year: 2019

Authors: De Regis M., Consolino L., Nafa M., Cappelli F., Bartalini S., De Natale P.

Autors Affiliation: Ist Nazl Ott INO CNR, Largo E Fermi 6, I-50125 Florence, Italy; European Lab Nonlinear Spect LENS, Via N Carrara 1, I-50019 Sesto Fiorentino, FI, Italy

Abstract: We provide an overview on THz frequency metrology, starting from the nowadays available continuous wave THz sources, discussing their main features such as tunability, spectral purity and possibility of frequency referencing to the primary frequency standard. A comparison on the achieved results in high precision molecular spectroscopy is given and discussed, and finally a special emphasis is placed on the future developments of this upcoming field. In fact, particular attention will be given to new generation metrological-grade THz sources, such as a novel 3-octaves-spanning room-temperature continuous-wave source based on difference frequency generation, and the latest developments regarding quantum cascade laser frequency combs based on four-wave-mixing nonlinear processes.

Conference title:

More Information: ISBN:978-1-5106-2942-4 ISSN: 0277-786X
Edited by:Razeghi, M; Baranov, AN; Vitiello, MS
Book Series: Proceedings of SPIE Volume: 11124
Article Number: UNSP 111240N
DOI: 10.1117/12.2529347
KeyWords: frequency metrology; frequency comb synthesizers; quantum cascade lasers; nonlinear terahertz generation; difference frequency generation; nonlinear waveguides; QCL combs