Adaptive suppression of optical jitter with a new liquid crystal beam steering device
Adaptive suppression of optical jitter with a new liquid crystal beam steering device
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利用新型液晶光束控制装置自适应抑制光学抖动
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
B. Wen
中科院分区：
文献类型：
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作者：
Pawel K. Orzechowski;S. Gibson;T. Tsao;D. Herrick;M. Mahajan;B. Wen
本文提出了一种新的方法来闭环控制的光学抖动与一种新的液晶光束转向装置。与激光束从受控镜面反射的常规快速转向镜相比，透射式液晶光束转向装置光学地重定向激光束。这种新装置没有活动部件，工作功率低。这项研究表明，这种新器件可以取代各种电光系统中的快速转向镜。本文介绍了透射式液晶光束控制装置的功能，沿着进行了实时自适应控制实验分析。实验结果表明，采用LTI反馈控制器，新型液晶光束控制器具有较强的抗干扰能力;采用前馈自适应控制器，新型液晶光束控制器的抗干扰能力明显提高。
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.