Mach-Zehnder interferometric system for measuring the refractive indices of uniaxial crystals

Year: 2003

Authors: De Nicola S., Ferraro P., Finizio A., De Natale P., Grilli S., Pierattini G.

Autors Affiliation: Istituto di Cibernetica del CNR, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
Istituto Nazionale di Ottica Applicata, Sez. di Napoli, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy

Abstract: We report a new interferometric technique for measuring the ordinary and extraordinary, refractive indices of uniaxial crystals. The technique is based on the measurement of the rotation-dependent phase changes of the optical path length in crystal plates. Accurate measurement of the phase shift as a function of the rotation of the sample is achieved by using a fast-Fourier-transform based fringe analysis method for phase retrieval. The principle of the method is discussed and measurements of the ordinary and extraordinary refractive indices of a lithium niobate crystal are reported.

Journal/Review: PROCEEDINGS OF SPIE

Volume: 5036      Pages from: 594  to: 599

KeyWords: lithium niobate; interferometry;
DOI: 10.1117/12.498644

Citations: 2
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