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Proceedings Paper

Adaptive suppression of optical jitter with a new liquid crystal beam steering device
Author(s): Pawel K. Orzechowski; Steve Gibson; Tsu-Chin Tsao; Dan Herrick; Milind Mahajan; Bing Wen
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Paper Abstract

This paper presents a new approach to closed-loop control of optical jitter with a new liquid crystal beam steering device. In contrast to conventional fast steering mirrors, where the laser beam is reflected of the controlled mirror surface, the transmissive liquid crystal beam steering device optically redirects the laser beam. The new device has no moving parts and requires low operating power. This research suggest the new device can replace the fast steering mirrors in a variety of electro-optic systems. The functionality of the transmissive liquid crystal beam steering device along with the analysis of real-time adaptive control experiments are described in this paper. The experimental results show that the new liquid crystal beam steering device can reject disturbances with an LTI feedback controller, and that the disturbance rejection capability can be improved significantly with feedforward adaptive control.

Paper Details

Date Published: 10 May 2007
PDF: 12 pages
Proc. SPIE 6569, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXI, 65690V (10 May 2007); doi: 10.1117/12.723302
Show Author Affiliations
Pawel K. Orzechowski, Univ. of California, Los Angeles (United States)
Steve Gibson, Univ. of California, Los Angeles (United States)
Tsu-Chin Tsao, Univ. of California, Los Angeles (United States)
Dan Herrick, Air Force Research Lab. (United States)
Milind Mahajan, Teledyne Scientific Co. (United States)
Bing Wen, Teledyne Scientific Co. (United States)


Published in SPIE Proceedings Vol. 6569:
Acquisition, Tracking, Pointing, and Laser Systems Technologies XXI
Steven L. Chodos; William E. Thompson, Editor(s)

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