Coherent imaging with pseudo-thermal incoherent light

Authors: Gatti, A.¹; Bache, M.¹; Magatti, D.¹; Brambilla, E.¹; Ferri, F.¹; Lugiato, L. A.¹

Source: Journal of Modern Optics, Volume 53, Numbers 5-6, March-April 2006 , pp. 739-760(22)

Publisher: Taylor and Francis Ltd

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Abstract:

We investigate experimentally fundamental properties of coherent ghost imaging using spatially incoherent beams generated from a pseudo-thermal source. A complementarity between the coherence of the beams and the correlation between them is demonstrated by showing a complementarity between ghost diffraction and ordinary diffraction patterns. In order for the ghost imaging scheme to work it is therefore crucial to have incoherent beams. The visibility of the information is shown for the ghost image to become better as the object size relative to the speckle size is decreased, and therefore a remarkable tradeoff between resolution and visibility exists. The experimental conclusions are backed up by both theory and numerical simulations.

Document Type: Research article

DOI: 10.1080/09500340500147240

Affiliations: 1: INFM, Dipartimento di Fisica e Matematica, Università dell'Insubria, Via Valleggio 11, 22100 Como, Italy

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