Scientific Results

Fresnel tomography and interferometric technique for characterizing Laguerre-Gaussian beams

Year: 2010

Authors: De Nicola S., Fedele R., Manko M.A., Manko V.I., Meucci R., Zito G.

Autors Affiliation: CNR, Istituto Nazionale di Ottica (INO), I-80078 Pozzuoli, Na Italy;
Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy;
Univ Naples Federico 2, Dipartimento Sci Fisiche, I-80126 Naples, Italy;
Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia;
CNR, Istituto Nazionale di Ottica, I-50125 Florence, Italy

Abstract: The Fresnel tomograms of Laguerre-Gaussian beams are found and the relation of the two-point spatial correlation function with the tomographic map is discussed. The spatial distribution and signature of vorticity of Laguerre-Gaussian modes is analyzed by measuring the two-point spatial correlation function of the one-dimensional projection of the vortex field. An interferometric approach, based on a Fourier projection algorithm, for the experimental determination of the two-point correlation function of the full complex vortex field at the cross-section plane of the recorded interference pattern is also described; this approach allows one to characterize the vortex structure and spatial coherence along the direction of propagation.


Volume: 31 (2)      Pages from: 139  to: 151

KeyWords: tomographic map; phase space; holographic interferometry; image reconstruction techniques;
DOI: 10.1007/s10946-010-9133-7

Citations: 2
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