Adaptive suppression of optical jitter with a new liquid crystal beam steering device

Pawel K. Orzechowski; Steve Gibson; Tsu-Chin Tsao; Dan Herrick; Milind Mahajan; Bing Wen

doi:10.1117/12.723302

10 May 2007 Adaptive suppression of optical jitter with a new liquid crystal beam steering device

Pawel K. Orzechowski, Steve Gibson, Tsu-Chin Tsao, Dan Herrick, Milind Mahajan, Bing Wen

Proceedings Volume 6569, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXI; 65690V (2007) https://doi.org/10.1117/12.723302
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

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.

Citation Download Citation

Pawel K. Orzechowski, Steve Gibson, Tsu-Chin Tsao, Dan Herrick, Milind Mahajan, and Bing Wen "Adaptive suppression of optical jitter with a new liquid crystal beam steering device", Proc. SPIE 6569, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXI, 65690V (10 May 2007); https://doi.org/10.1117/12.723302

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