| 液晶光学相控阵光束偏转效率研究(英文) |
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| 引用本文： | 邹永超,周朴,司磊,马浩统,陶汝茂. 液晶光学相控阵光束偏转效率研究(英文)[J]. 激光与光电子学进展, 2011, 0(6) |
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| 作者姓名： | 邹永超 周朴 司磊 马浩统 陶汝茂 |
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| 作者单位： | 国防科学技术大学光电科学与工程学院; |
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| 摘 要： | 液晶光学相控阵(LCOPA)的光束偏转效率(OSE)定义为一级衍射光强与总入射光强的比值,它受很多因素的影响,因此建立一个数值分析的模型来分析光束偏转效率。这个模型将液晶光学相控阵器件当作一个相位光栅和一个振幅光栅的组合体,可控变量既包括几何结构参数又包括相位分布的参数。理论研究了光束偏转效率和三类因素即偏转角、器件参数及理想与实际相位分布误差之间的关系,提出了改善光束偏转光效率的方法。结果表明随着偏转角的增大光束偏转效率将会减小,而增大填充因子、减小像素大小会提高光束偏转效率。均匀排布像素并不能获得最佳偏转效率,需要使用如时域有限差分等方法来得到最佳的像素分布。减小相邻相移器之间的间隔、提高相位回置值可以明显提高光束偏转效率。
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| 关 键 词： | 液晶光学 光学相控阵 光束偏转效率 相位 像素 |
Theoretical Study on Beam Steering Efficiency of Liquid Crystal Optical Phased Array |
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| Zou Yongchao Zhou PuSi Lei Ma Haotong Tao Rumao. Theoretical Study on Beam Steering Efficiency of Liquid Crystal Optical Phased Array[J]. Laser & Optoelectronics Progress, 2011, 0(6) |
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| Authors: | Zou Yongchao Zhou PuSi Lei Ma Haotong Tao Rumao |
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| Affiliation: | Zou Yongchao Zhou PuSi Lei Ma Haotong Tao Rumao(College of Optoelectrics Science and Engineering,National University of Defense Technology,Changsha,Hunan 410073,China) |
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| Abstract: | The overall steering efficiency(OSE) of the liquid crystal optical phased array(LCOPA) is defined as the ratio of the first order diffraction's intensity and the incident intensity.It is affected by many factors.A numerical analysis model is established to analyze the OSE.The model regards a LCOPA as the combination of a phase grating and an amplitude grating,and thus,model parameters include not only the geometric structural parameters but also the parameters of the phase profile.The general relations betw... |
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| Keywords: | liquid crystal optics optical phased array beam steering efficiency phase pixel |
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