Simultaneous acquisition of pi/2 phase-stepped interferograms with a photorefractive Bi(12)GeO(20) crystal: application to real-time double-pulse holography.
We present a novel method for real-time analysis of vibrations in double-pulse laser holography. Two pi/2 phase-stepped interferograms are obtained simultaneously. An experimental demonstration gives a phase measurement with an accuracy of 4 degrees .
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Labrunie
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Pauliat
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Roosen
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Launay