摘要
为了实现大角度的光束扫描,提出一种基于混合蝙蝠算法的非均匀间隔光学相控阵来对栅瓣进行压缩。将遗传算法的算子与传统蝙蝠算法相结合,在相邻阵元最小间隔为2μm,工作波长为1550 nm的情况下,优化得到的硅基64阵元一维非均匀间隔光学相控阵实现了80°的扫描范围,边模抑制比优于-8 dB,最大远场光束发散角为0.3°,并且讨论了优化结果对波长变化的不敏感性。最后,以8×8的二维矩形平面阵列为例,演示了二维非均匀间隔光学相控阵的优化方法。
A grating-lobe-suppressed aperiodic optical phased array optimized by the hybrid bat algorithm is proposed to achieve a large beam scanning range.After the operators of the genetic algorithm are combined with the traditional bat algorithm,the silicon-based 64-unit one-dimensional aperiodic optical phased array is optimized at a wavelength of 1550 nm and a minimum pitch of 2μm.The side mode suppression ratio is better than-8 dB in the 80°scanning range,and the maximum far-field beam divergence angle is 0.3°.The insensitivity of the optimized results to wavelength change is also discussed.With an 8×8 two-dimensional rectangular planar array as an example,the optimization method of the two-dimensional aperiodic optical phased array is demonstrated.
作者
李文磊
陈敬业
时尧成
Li Wenlei;Chen Jingye;Shi Yaocheng(Science and Technology on Electromechanical Dynamic Control Laboratory,Xi'an,Shaanxi 710065,China;College of Optical Science and Engineering,Zhejiang University,Hangzhou,Zhejiayig 310027,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2021年第18期148-155,共8页
Acta Optica Sinica
基金
重点实验室基金(6142601180303)
国家自然科学基金(61922070)。
关键词
集成光学
光学相控阵
非均匀间隔阵列
边模抑制比
混合蝙蝠算法
integrated optics
optical phased array
aperiodic array
side mode suppression ratio
hybrid bat algorithm
