Interferometry and sub-millisecond phase modulation with liquid crystal light valves

Stefania Residori; Umberto Bortolozzo; Jean-Pierre Huignard

doi:10.1117/12.2595585

1 August 2021 Interferometry and sub-millisecond phase modulation with liquid crystal light valves

Stefania Residori, Umberto Bortolozzo, Jean-Pierre Huignard

Proceedings Volume 11807, Liquid Crystals XXV; 118070O (2021) https://doi.org/10.1117/12.2595585
Event: SPIE Organic Photonics + Electronics, 2021, San Diego, California, United States

Abstract

We present sub-millisecond response time of liquid crystal light valves (LCLV), optically addressable spatial light modulators with a continuous photosensitive layer used to drive the orientation of a nematic LC layer. By using a LCLV with a Bi12SiO20 crystal as a photoconductor, we show that the voltage working point can be set close to the saturation of the optical response, providing a reduced molecular excursion and, correspondingly, a faster response time. With a small refractive index change but still detectable diffractive efficiency, the LCLV responds in a large frequency band. Phase gratings are observed at ~ kHz modulations. Applications include dynamic holography, biomedical imaging, turbulence correction and/or simulation, lidar applications.

Conference Presentation

Citation Download Citation

Stefania Residori, Umberto Bortolozzo, and Jean-Pierre Huignard "Interferometry and sub-millisecond phase modulation with liquid crystal light valves", Proc. SPIE 11807, Liquid Crystals XXV, 118070O (1 August 2021); https://doi.org/10.1117/12.2595585

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