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Opt Express. 2010 Jun 21;18(13):13782-7. doi: 10.1364/OE.18.013782.

Real-time coherence holography.

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Laboratory for Information Photonics and Wave Signal processing, Department of Information and Communication Engineering, The University of Electro-Communications, Chofu, Tokyo, Japan.


Coherence holography capable of real-time recording and reconstruction is proposed and experimentally demonstrated with a generic Leith-type coherence hologram. The coherence hologram is optically generated in real-time using a Mach-Zehnder interferometer and reconstructed using a Sagnac radial shearing interferometer. With this method one can create an optical field distribution with a desired spatial coherence function, and visualize the coherence function in real-time as the contrast and phase variations in an interference fringe pattern. The reconstructed image of the complex coherence function has been quantified with the Fourier transform method of fringe-pattern analysis.

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