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.
Fresnel tomography and interferometric technique for characterizing Laguerre–Gaussian beams / S., De Nicola; Fedele, Renato; M. A., Man’Ko; V. I., Man’Ko; R., Meucci; G., Zito. - In: JOURNAL OF RUSSIAN LASER RESEARCH. - ISSN 1071-2836. - STAMPA. - 31:(2010), pp. 139-151. [10.1007/s10946-010-9133-7]
Fresnel tomography and interferometric technique for characterizing Laguerre–Gaussian beams
FEDELE, RENATO;
2010
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
