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Proceedings Article

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

[+] Author Affiliations
Dong-Feng Gu, Bruce Winker, Bing Wen, Don Taber, Andrew Brackley

Rockwell Scientific Co. (USA)

Allan Wirth, Marc Albanese, Frank Landers

Adaptive Optics Associates, Inc. (USA)

Proc. SPIE 5553, Advanced Wavefront Control: Methods, Devices, and Applications II, 68 (October 12, 2004); doi:10.1117/12.562088
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From Conference Volume 5553

  • Advanced Wavefront Control: Methods, Devices, and Applications II
  • John D. Gonglewski; Mark T. Gruneisen; Michael K. Giles
  • Denver, CO | August 02, 2004

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.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Dong-Feng Gu ; Bruce Winker ; Bing Wen ; Don Taber ; Andrew Brackley, et al.
"Wavefront control with a spatial light modulator containing dual-frequency liquid crystal", Proc. SPIE 5553, Advanced Wavefront Control: Methods, Devices, and Applications II, 68 (October 12, 2004); doi:10.1117/12.562088; http://dx.doi.org/10.1117/12.562088


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