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Proceedings Paper

Wavefront control with a spatial light modulator containing dual-frequency liquid crystal
Author(s): Dong-Feng Gu; Bruce Winker; Bing Wen; Don Taber; Andrew Brackley; Allan Wirth; Marc Albanese; Frank Landers
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Paper 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.

Paper Details

Date Published: 12 October 2004
PDF: 15 pages
Proc. SPIE 5553, Advanced Wavefront Control: Methods, Devices, and Applications II, (12 October 2004); doi: 10.1117/12.562088
Show Author Affiliations
Dong-Feng Gu, Rockwell Scientific Co. (United States)
Bruce Winker, Rockwell Scientific Co. (United States)
Bing Wen, Rockwell Scientific Co. (United States)
Don Taber, Rockwell Scientific Co. (United States)
Andrew Brackley, Rockwell Scientific Co. (United States)
Allan Wirth, Adaptive Optics Associates, Inc. (United States)
Marc Albanese, Adaptive Optics Associates, Inc. (United States)
Frank Landers, Adaptive Optics Associates, Inc. (United States)

Published in SPIE Proceedings Vol. 5553:
Advanced Wavefront Control: Methods, Devices, and Applications II
John D. Gonglewski; Mark T. Gruneisen; Michael K. Giles, Editor(s)

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