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Optimization of the focusing characteristics of Fresnel zone plates fabricated with a femtosecond laser
Zhou, Fang1; Sun, Xiaoyan1; Zhong, Hongmin1; Duan, Lian1; Hu, Youwang1; Duan, Ji'an1; Li, Ming2
Department瞬态光学研究室
Source PublicationJOURNAL OF MODERN OPTICS
ISSN0950-0340;1362-3044
Contribution Rank2
Abstract

In this research, amplitude Fresnel zone plates (FZPs) were fabricated on fused silica glass with femtosecond laser. The focusing characteristics including focal length, diffraction efficiency, geometric concentrator ratio, spot energy uniformity, depth of focus and resolution were studied by simulations and experiments. To optimize the focusing characteristics of FZP, we proposed an optimized machining process, an extended FZP and an fractal FZP. The optimized machining process increased the diffraction efficiency of the amplitude FZP from 6.96% to 8.14%, the extended FZP broke through the limit of minimum line width in processing and improved the resolution, and the fractal FZP increased the focus depth from 4 mm to 10 mm. In addition, we wrote a FZP on the end face of multi mode fiber, the divergent annular beam converged and formed an focus ring at the focal plane. This research will provide broad applications in fiber tweezers, beam coupling and optical communication.

KeywordMicro-optical components Fresnel zone plates focusing characteristics femtosecond laser fiber
DOI10.1080/09500340.2021.1879300
Indexed BySCI
Language英语
WOS IDWOS:000614500900001
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.opt.ac.cn/handle/181661/94283
Collection瞬态光学研究室
Corresponding AuthorSun, Xiaoyan
Affiliation1.Cent South Univ, Coll Mech & Elect Engn, State Key Lab High Performance & Complex Mfg, Changsha 410083, Peoples R China
2.Xian Inst Opt & Precis Mech CAS, Key Lab Transient Opt & Photon, Xian, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Fang,Sun, Xiaoyan,Zhong, Hongmin,et al. Optimization of the focusing characteristics of Fresnel zone plates fabricated with a femtosecond laser[J]. JOURNAL OF MODERN OPTICS.
APA Zhou, Fang.,Sun, Xiaoyan.,Zhong, Hongmin.,Duan, Lian.,Hu, Youwang.,...&Li, Ming.
MLA Zhou, Fang,et al."Optimization of the focusing characteristics of Fresnel zone plates fabricated with a femtosecond laser".JOURNAL OF MODERN OPTICS
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