Coherent imaging with pseudo-thermal incoherent light

A. Gatti, Morten Bache, D. Magatti, E. Brambilla, F. Ferri, L.A. Lugiato

Research output: Contribution to journalJournal articleResearchpeer-review


We investigate experimentally fundamental properties of coherent ghost imaging using spatially incoherent beams generated from a pseudo-thermal source. A complementarity between the coher- ence 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 conclu- sions are backed up by both theory and numerical simulations.
Original languageEnglish
JournalJournal of Modern Optics
Issue numberMarch/April
Pages (from-to)739-760
Publication statusPublished - 2006


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