Photorefractive coherence gating for laser interferometric applications

Akira Shiratori; Minoru Obara

doi:10.1117/12.349222

26 May 1999 Photorefractive coherence gating for laser interferometric applications

Akira Shiratori, Minoru Obara

Proceedings Volume 3610, Laser Material Crystal Growth and Nonlinear Materials and Devices; (1999) https://doi.org/10.1117/12.349222
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

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.

Citation Download Citation

Akira Shiratori and Minoru Obara "Photorefractive coherence gating for laser interferometric applications", Proc. SPIE 3610, Laser Material Crystal Growth and Nonlinear Materials and Devices, (26 May 1999); https://doi.org/10.1117/12.349222

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