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Optical Engineering

Real-time holographic interferometry using optical phase conjugation in photorefractive materials and direct spatial phase reconstruction
Author(s): Valentin I. Vlad; Daniel Malacara-Hernandez; Adrian Petris
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Paper Abstract

The structure and operation of a holographic interferometer that uses photorefractive Bi12TiO20 crystals as reusable recording materials and computer image processing for rapid and precise interpretation of the fringe patterns are discussed. Different types of two-wave and four-wave mixing were applied to optical testing by double-exposure holographic interferometry. A very convenient matching was found in the phase-conjugation setup for the Bi12TiO20 crystals and usual He-Ne lasers, when the exposures were of ~10 s for light energy densities of 4×10-3W/cm2. Simple algorithms and direct spatial phase reconstruction were used for computer image processing of the fringe patterns.

Paper Details

Date Published: 1 May 1996
PDF: 6 pages
Opt. Eng. 35(5) doi: 10.1117/1.600694
Published in: Optical Engineering Volume 35, Issue 5
Show Author Affiliations
Valentin I. Vlad, Institute of Atomic Physics (Romania)
Daniel Malacara-Hernandez, Ctr. de Investigaciones en Optica, A.C. (Mexico)
Adrian Petris, Institute of Atomic Physics (Romania)

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