Scientific Results

Temporal and spatial characterization of a pulsed gas jet by a compact high-speed high-sensitivity second-harmonic interferometer

Year: 2011

Authors: Brandi F., Giammanco F.

Autors Affiliation: Nanophysics Division, Italian Institute of Technology, Via Morego 30, Genova, Italy; Physics Department, University of Pisa, Largo B. Pontecorvo 3, Pisa, Italy

Abstract: A compact modular high-speed high-sensitivity second-harmonic interferometer is used to characterize a pulsed gas jet. The temporal evolution of the line-integrated gas density is measured with a resolution of 1 ┬Ás revealing detailed information on its dynamics. The actual radial gas density distribution in the jet is obtained applying the Abel\’s inversion method. The sensitivity of the interferometer is 1 mrad, and its robustness, compactness and modularity make the instrument suitable for practical application. Possible use of the instrument in monitoring cluster formation, and phase-dispersion microscopy is discussed.

Journal/Review: OPTICS EXPRESS

Volume: 19 (25)      Pages from: 25479  to: 25487

KeyWords: Optical instruments; Interferometry; Phase measurement; Diagnostic applications of nonlinear optics.
DOI: 10.1364/OE.19.025479

Citations: 10
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English