Spatial coherence characterization of light: an experimental study using digital micromirror devices

We present spatial coherence measurements of partially coherent light in the far-field of incoherent sources with an experimental setup based on the Thompson-Wolf and Partanen-Turunen-Tervo experiments, to be performed in the context of a possible solar coherence measurement space instrument. The op...

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Bibliographic Details
Published inarXiv.org
Main Authors Magalhães, Tiago E C, Rebordão, José M, Cabral, Alexandre
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 24.09.2020
Subjects
Apertures
Coherent light
Collimation
Diameters
Optical fibers
Physics - Instrumentation and Detectors
Physics - Optics
Retroreflection
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Summary:We present spatial coherence measurements of partially coherent light in the far-field of incoherent sources with an experimental setup based on the Thompson-Wolf and Partanen-Turunen-Tervo experiments, to be performed in the context of a possible solar coherence measurement space instrument. The optical setup consists of a telescope to collimate light from a source, to diffract it by a digital micromirror device implementing a Young double-aperture interferometer in retroreflection mode, and finally to image the source into a two-dimensional sensor. Two multimode optical fibers with different diameters were used as incoherent sources and the results obtained for the spectral degree of coherence are compared to those expected from the van Cittert-Zernike theorem.
ISSN:2331-8422
DOI:10.48550/arxiv.1911.08885