Super-oscillation sub-diffraction focusing with emulated atmospheric turbulence

被引：1
作者：
Yao, Na [1 ]
Jiao, Jiao [1 ]
Duan, Jingxuan [1 ]
Chen, Mo [2 ,3 ]
He, Duanpeng [4 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Aeronaut & Astronaut, Chengdu 611731, Peoples R China
[2] Natl Lab Adapt Opt, Chengdu 610209, Peoples R China
[3] Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China
[4] China Aerosp Components Engn Ctr, Beijing 100094, Peoples R China
来源：
OPTICS AND LASERS IN ENGINEERING | 2025年 / 184卷
基金：
中国国家自然科学基金;
关键词：
Super-oscillation; Adaptive optics; Fourier optics; Diffraction limit; Wavefront aberration; SUPERRESOLUTION;
D O I：
10.1016/j.optlaseng.2024.108675
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The super-oscillation (SO) phenomena successfully applied to super-resolution optical telescopes have yet to study the existence of atmospheric turbulence (AT). In this paper, we first experimentally investigate the subdiffraction focusing of the SO light field in the atmospheric-like turbulence. The 137-element adaptive optics (AO) system is utilized to correct the dynamic wavefront aberration produced by the AT and obtain the AO closed-loop RMS of the residual wavefront error lambda/15. For a proofed telescope (clear aperture 12 mm and focal length 1000 mm) @lambda=632.8 nm, the FWHM of the experimental SO spot under the modest AT (wavefront error RMS 0.57 lambda) is about 0.79 times of the Airy spot compared with the non-AT result of 0.76 times, while the strong AT (wavefront error RMS 1.35 lambda) erases the sub-diffraction focusing effect of the SO field and the average side-lobe intensity increases significantly. This study is promising for super-resolving telescope, synthetic aperture for visible imaging, etc.
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页数：6
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