26 May 1999 Photorefractive coherence gating for laser interferometric applications
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Abstract
A novel noise-insensitive optical interferometric technique has been developed for highly scattering environment, using photorefractive coherence grating. Two-wave mixing process in a photorefractive barium titanate crystal effectively reduces scattering noise, and we have successfully detected interferometric signals through scattering media of up to 17 mfp, with a high visibility. We have also demonstrated two- dimensional thickness measurement of an optically scattering thin film using our new interferometry.
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Akira Shiratori, Akira Shiratori, Minoru Obara, Minoru Obara, } "Photorefractive coherence gating for laser interferometric applications", Proc. SPIE 3610, Laser Material Crystal Growth and Nonlinear Materials and Devices, (26 May 1999); doi: 10.1117/12.349222; https://doi.org/10.1117/12.349222
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