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Proceedings Paper

Single QCL-based sensor measuring the simultaneous displacement of independent targets
Author(s): Lorenzo Columbo; Francesco Paolo Mezzapesa; Massimo Brambilla; Maurizio Dabbicco; Gaetano Scamarcio
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Paper Abstract

We demonstrate a common-path optical interferometer based on a quantum-cascade laser (QCL), in which the QCL acts both as source and detector of the infrared radiation. The collinear arms of the interferometer are terminated by a plastic surface (acting as the beam splitter) and by a metallic one (acting as the mirror). The different reflectivity of the surfaces allows for high contrast feedback-interferometry fringes exhibited on the laser-emitted power and revealed by voltage compliance measurement at the QCL terminals. The displacement of each surface can be identified and measured with sub wavelength resolution. The experimental results are in excellent agreement with the numerical simulations based on the Lang-Kobayashi model for multiple cavities. Applications to microfluidics and resonant chemical detection can be envisaged.

Paper Details

Date Published: 4 February 2013
PDF: 6 pages
Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86312L (4 February 2013); doi: 10.1117/12.2004295
Show Author Affiliations
Lorenzo Columbo, CNR-IFN UOS Bari (Italy)
Univ. dell’Insubria (Italy)
Francesco Paolo Mezzapesa, CNR-IFN UOS Bari (Italy)
Univ. degli Studi e Politecnico di Bari (Italy)
Massimo Brambilla, CNR-IFN UOS Bari (Italy)
Univ. degli Studi e Politecnico di Bari (Italy)
Maurizio Dabbicco, CNR-IFN UOS Bari (Italy)
Univ. degli Studi e Politecnico di Bari (Italy)
Gaetano Scamarcio, CNR-IFN UOS Bari (Italy)
Univ. degli Studi e Politecnico di Bari (Italy)


Published in SPIE Proceedings Vol. 8631:
Quantum Sensing and Nanophotonic Devices X
Manijeh Razeghi, Editor(s)

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