一种新型的光波导光学相控阵的特性研究（英文）

发布时间：2018-04-11 07:57

本文选题：光学相控阵 + 光子晶体光纤　；参考：《红外与激光工程》2017年06期

【摘要】：采用光纤作为传输链路,将光子晶体光纤作为系统的输出阵列,LiN bO 3波导作为相位调制器,构建了一种基于光纤光路的光波导光学相控阵。根据光学相控阵理论和LiN bO 3波导的电光效应,分析了系统的可行性,并研究了这种新型结构下的光波导光学相控阵的输出衍射特性和光子晶体光纤阵列结构参数的关系。研究结果表明通过控制施加在LiN bO 3波导上的电压可以改变出射光束的附加相位从而实现光束的偏转;光子晶体光纤阵列上的纤芯数量、纤芯间距以及纤芯的排列方式等结构参量会对系统的输出光束的光强分布、半峰值全宽度(FWHM)和归一化的振幅分布产生影响。随着光子晶体光纤制作工艺的不断发展,系统的光束扫描质量将会逐渐提高并且色散特性和传输特性将会获得改善,为今后这种光学相控阵系统的设计提供了理论基础和技术依据。
[Abstract]:Using optical fiber as transmission link and photonic crystal fiber as the output array of the system, Linbo _ 3 waveguide as phase modulator, an optical waveguide phased array based on optical fiber is constructed.Based on the theory of optical phased array and the electro-optic effect of LiN bO3 waveguide, the feasibility of the system is analyzed, and the relationship between the output diffraction characteristics of the optical phased array and the structure parameters of photonic crystal fiber array is studied.The results show that the additional phase of the emitted beam can be changed by controlling the voltage applied on the LiN bO3 waveguide, and the number of cores on the photonic crystal fiber array can be changed.The structure parameters, such as the spacing of the core and the arrangement of the core, have an effect on the intensity distribution of the output beam, the full width of the half-peak and the normalized amplitude distribution.With the development of photonic crystal fiber fabrication technology, the beam scanning quality of the system will be improved gradually, and the dispersion and propagation characteristics will be improved.It provides a theoretical and technical basis for the design of this optical phased array system in the future.
【作者单位】：北京航空航天大学精密光机电一体化技术教育部重点实验室;
【基金】：国家自然科学基金(61307021)
【分类号】：TN252

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