Mid-infrared homodyne balanced detector for quantum light characterization

Year: 2021

Authors: Gabbrielli T., Cappelli F., Bruno N., Corrias N., Borri S., De Natale P., Zavatta A.

Autors Affiliation: Inst Nazl Ott CNR INO, Largo Enrico Fermi 6, I-50125 Florence, Italy; European Lab Nonlinear Spect LENS, Via Nello Carrara 1, I-50019 Florence, Italy; Ist Nazl Fis Nucl INFN, Sez Firenze, I-50019 Florence, Italy.

Abstract: We present the characterization of a novel balanced homodyne detector operating in the mid-infrared. The challenging task of revealing non-classicality in mid-infrared light, e. g. in quantum cascade lasers emission, requires a high-performance detection system. Through the intensity noise power spectral density analysis of the differential signal coming from the incident radiation, we show that our setup is shot-noise limited. We discuss the experimental results with a view to possible applications to quantum technologies, such as free-space quantum communication. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Journal/Review: OPTICS EXPRESS

Volume: 29 (10)      Pages from: 14536  to: 14547

More Information: H2020 Future and Emerging Technologies (Qombs, grant n. 820419); European Strategy Forum on Research Infrastructures (ESFRI) (Extreme Light Infrastructure – ELI Project); Laserlab-Europe (871124).
KeyWords: cascade laser; frequency comb; optical homodyne;squeezed states; high-precision; spectroscopy; noise; feasibility
DOI: 10.1364/OE.420990

Citations: 12
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