Detection of phase change of light using photorefractive liquid crystals and their application to laser ultrasonics

Takeo Sasaki; Toshinobu Takashi; Yukihiro Ishii; Khoa Van Le; Yumiko Naka

doi:10.1117/12.3005672

11 March 2024 Detection of phase change of light using photorefractive liquid crystals and their application to laser ultrasonics

Takeo Sasaki, Toshinobu Takashi, Yukihiro Ishii, Khoa Van Le, Yumiko Naka

Author Affiliations +

Proceedings Volume 12883, Organic Photonic Materials and Devices XXVI; 1288305 (2024) https://doi.org/10.1117/12.3005672
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Coaxial- and counter-optical setups for laser ultrasonics using a photorefractive liquid crystal were fabricated. In laser ultrasonics, an object is irradiated with a laser pulse to create an ultrasonic vibration, and then another laser beam is used to detect the vibration. The phase of the laser beam reflected from the object is shifted by the ultrasonic vibration. By using liquid crystals with photorefractive properties, the resulting phase shift of the laser beam reflected from the material can be detected. Compared to traditional laser ultrasonic methods, this system offers a simpler optical setup and allows for more accurate measurements that are not affected by environmental vibrations.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Takeo Sasaki, Toshinobu Takashi, Yukihiro Ishii, Khoa Van Le, and Yumiko Naka "Detection of phase change of light using photorefractive liquid crystals and their application to laser ultrasonics", Proc. SPIE 12883, Organic Photonic Materials and Devices XXVI, 1288305 (11 March 2024); https://doi.org/10.1117/12.3005672

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