一种液晶相控阵中基于迭代的相位恢复算法

发布时间：2018-01-06 19:13

本文关键词：一种液晶相控阵中基于迭代的相位恢复算法　出处：《光学学报》2014年05期 　论文类型：期刊论文

【摘要】：在液晶相控阵中,由于电压量化、边缘效应、液晶器件制造工艺等因素的影响,导致实际的波前相位面与理想的波阵面存在误差。因此,在应用中要依据实际出射相位与理想出射相位的偏差,反复地修正加载电压,对入射激光波前进行相位调制,以此来满足视场域内波束扫描的需要,这也是液晶相控阵波束控制技术研究的关键问题。为解决上述问题,提出了一种波前相位恢复算法。该算法利用三个输出面的幅度信息迭代计算出波前相位分布,相比只用两个输出面幅度信息的相位恢复算法,该算法具有较高的精确度。同时,该算法利用角谱理论处理输出面的光场传播过程,使得所得到的恢复结果更加精确。仿真实验进一步表明,这种算法在精确度、效率上同时具有优势。
[Abstract]:In liquid crystal phased array, due to the influence of voltage quantization, edge effect, liquid crystal device manufacturing process and other factors, there are errors between the actual wavefront phase surface and the ideal wavefront surface. In application, the loading voltage should be modified repeatedly according to the deviation between the actual outgoing phase and the ideal outgoing phase, and the phase modulation of the incident laser wave front should be carried out in order to meet the needs of beam scanning in the field of view. This is also a key problem in the research of liquid crystal phased array beam control technology. A wave front phase recovery algorithm is proposed, which iteratively calculates the wavefront phase distribution using the amplitude information of the three output surfaces, compared with the phase recovery algorithm with only two output surface amplitude information. The algorithm has a high accuracy. At the same time, the algorithm uses the angular spectrum theory to deal with the process of light field propagation on the output surface, which makes the recovery results more accurate. The simulation results show further. This algorithm has advantages in accuracy and efficiency.
【作者单位】：电子科技大学电子工程学院;光电信息控制和安全技术重点实验室;
【基金】：国家自然科学基金(61178068) 国家基础科研计划资助(B1120110006)
【分类号】：TN957
【正文快照】： 1引言激光雷达结合了雷达技术和激光技术的优势,具有高分辨率、精准、快速、灵敏等一系列独特的特点[1-2],在军事和民用领域均得到了广泛的关注。0505001-1液晶相控阵是实现雷达波束控制的主流技术,可以实现高速稳定的驱动波束指向。同时,以液晶相控阵为代表的非机械式波束控

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