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Proceedings Paper

Photorefractive coherence gating for laser interferometric applications
Author(s): Akira Shiratori; Minoru Obara
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Paper 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.

Paper Details

Date Published: 26 May 1999
PDF: 7 pages
Proc. SPIE 3610, Laser Material Crystal Growth and Nonlinear Materials and Devices, (26 May 1999); doi: 10.1117/12.349222
Show Author Affiliations
Akira Shiratori, Keio Univ. (Japan)
Minoru Obara, Keio Univ. (Japan)

Published in SPIE Proceedings Vol. 3610:
Laser Material Crystal Growth and Nonlinear Materials and Devices
Kathleen I. Schaffers; Lawrence E. Myers, Editor(s)

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