Direct refractive index retrieval from interferometry measurements

We present an alternative numerical method to the Abel inversion technique, which can be applied to complex non-symmetrical systems. A comparison with the Abel inversion algorithm was conducted. For benchmarking, the method was applied to a synthetic trace representing a plasma waveguide characteriz...

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Veröffentlicht in:Review of scientific instruments 2020-04, Vol.91 (4), p.045111-045111
Hauptverfasser: Galletti, Mario, Künzel, Swen, Alves, Joana, Hariton, Victor, Pires, Hugo, João, Celso Paiva, Figueira, Gonçalo, Dias, João Mendanha
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Sprache:eng
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Zusammenfassung:We present an alternative numerical method to the Abel inversion technique, which can be applied to complex non-symmetrical systems. A comparison with the Abel inversion algorithm was conducted. For benchmarking, the method was applied to a synthetic trace representing a plasma waveguide characterized by a constant parabolic density profile. Furthermore, the temperature and refractive index of a plume of hot air surrounding a non-cylindrical soldering iron were retrieved. Temperatures between 50 °C and 200 °C were successfully retrieved within the instrument precision. The proposed method allows robust and fast data retrieval while maintaining the accuracy and resolution of well-known methods, as Abel inversion.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5129093