Wavefront control with a spatial light modulator containing dual-frequency liquid crystal

Dong-Feng Gu; Bruce Winker; Bing Wen; Don Taber; Andrew Brackley; Allan Wirth; Marc Albanese; Frank Landers

doi:10.1117/12.562088

12 October 2004 Wavefront control with a spatial light modulator containing dual-frequency liquid crystal

Dong-Feng Gu, Bruce Winker, Bing Wen, Don Taber, Andrew Brackley, Allan Wirth, Marc Albanese, Frank Landers

Proceedings Volume 5553, Advanced Wavefront Control: Methods, Devices, and Applications II; (2004) https://doi.org/10.1117/12.562088
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

A versatile, scalable wavefront control approach based upon proven liquid crystal (LC) spatial light modulator (SLM) technology was extended for potential use in high-energy near-infrared laser applications. The reflective LC SLM module demonstrated has a two-inch diameter active aperture with 812 pixels. Using an ultra-low absorption transparent conductor in the LC SLM, a high laser damage threshold was demonstrated. Novel dual frequency liquid crystal materials and addressing schemes were implemented to achieve fast switching speed (<1ms at 1.31 microns). Combining this LCSLM with a novel wavefront sensing method, a closed loop wavefront controller is being demonstrated. Compared to conventional deformable mirrors, this non-mechanical wavefront control approach offers substantial improvements in speed (bandwidth), resolution, power consumption and system weight/volume.

Citation Download Citation

Dong-Feng Gu, Bruce Winker, Bing Wen, Don Taber, Andrew Brackley, Allan Wirth, Marc Albanese, and Frank Landers "Wavefront control with a spatial light modulator containing dual-frequency liquid crystal", Proc. SPIE 5553, Advanced Wavefront Control: Methods, Devices, and Applications II, (12 October 2004); https://doi.org/10.1117/12.562088

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