Phase-locking to a free-space terahertz comb for metrological-grade terahertz lasers

L. Consolino (), A. Taschin, P. Bartolini, S. Bartalini, P. Cancio, A. Tredicucci, H. E. Beere, D. A. Ritchie, R. Torre, M. S. Vitiello and P. De Natale
Additional contact information
L. Consolino: LENS, European Laboratory for NonLinear Spectroscopy
A. Taschin: LENS, European Laboratory for NonLinear Spectroscopy
P. Bartolini: LENS, European Laboratory for NonLinear Spectroscopy
S. Bartalini: LENS, European Laboratory for NonLinear Spectroscopy
P. Cancio: LENS, European Laboratory for NonLinear Spectroscopy
A. Tredicucci: NEST, Istituto Nanoscienze – CNR and Scuola Normale Superiore
H. E. Beere: Cavendish Laboratory, University of Cambridge
D. A. Ritchie: Cavendish Laboratory, University of Cambridge
R. Torre: LENS, European Laboratory for NonLinear Spectroscopy
M. S. Vitiello: INO, Istituto Nazionale di Ottica – CNR, Largo E. Fermi 6
P. De Natale: LENS, European Laboratory for NonLinear Spectroscopy

Nature Communications, 2012, vol. 3, issue 1, 1-5

Abstract: Abstract Optical frequency comb synthesizers have represented a revolutionary approach to frequency metrology, providing a grid of frequency references for any laser emitting within their spectral coverage. Extending the metrological features of optical frequency comb synthesizers to the terahertz domain would be a major breakthrough, due to the widespread range of accessible strategic applications and the availability of stable, high-power and widely tunable sources such as quantum cascade lasers. Here we demonstrate phase-locking of a 2.5 THz quantum cascade laser to a free-space comb, generated in a LiNbO3 waveguide and covering the 0.1–6 THz frequency range. We show that even a small fraction (

Date: 2012
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DOI: 10.1038/ncomms2048

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