Shaping the focal intensity distribution using spatial coherence

T. van Dijk, G.J. Gbur, T.D. Visser

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The intensity and the state of coherence are examined in the focal region of a converging, partially coherent wave field. In particular, Bessel-correlated fields are studied in detail. It is found that it is possible to change the intensity distribution and even to produce a local minimum of intensity at the geometrical focus by altering the coherence length. It is also shown that, even though the original field is partially coherent, in the focal region there are pairs of points at which the field is fully correlated and pairs of points at which the field is completely incoherent. The relevance of this work to applications such as optical trapping and beam shaping is discussed. © 2008 Optical Society of America.
Original languageEnglish
Pages (from-to)575-581
JournalJournal of the Optical Society of America. A: Optics, image science, and vision.
Volume25
Issue number3
DOIs
Publication statusPublished - 2008

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Shaping the focal intensity distribution using spatial coherence

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