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Engineering the on-axis intensity of Bessel beam by a feedback tuning loop
Li, Runze1,2,3; Yu, Xianghua1; Yang, Yanlong1; Peng, Tong1,3; Yao, Baoli1; Zhang, Chunmin2; Ye, Tong4; Yao, Baoli (yaobl@opt.ac.cn)
Conference NameThree-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XXV 2018
Source PublicationThree-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XXV
Conference Date2018-01-29
Conference PlaceSan Francisco, CA, United states
Contribution Rank1

The Bessel beam belongs to a typical class of non-diffractive optical fields that are characterized by their invariant focal profiles along the propagation direction. However, ideal Bessel beams only rigorously exist in theory; Bessel beams generated in the lab are quasi-Bessel beams with finite focal extensions and varying intensity profiles along the propagation axis. The ability to engineer the on-axis intensity profile to the desired shape is essential for many applications. Here we demonstrate an iterative optimization-based approach to engineering the on-axis intensity of Bessel beams. The genetic algorithm is used to demonstrate this approach. Starting with a traditional axicon phase mask, in the design process, the computed on-axis beam profile is fed into a feedback tuning loop of an iterative optimization process, which searches for an optimal radial phase distribution that can generate a generalized Bessel beam with the desired onaxis intensity profile. The experimental implementation involves a fine-tuning process that adjusts the originally targeted profile so that the optimization process can optimize the phase mask to yield an improved on-axis profile. Our proposed method has been demonstrated in engineering several zeroth-order Bessel beams with customized on-axis profiles. High accuracy and high energy throughput merit its use in many applications. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Indexed ByEI
EI Accession Number20181605022292
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Document Type会议论文
Corresponding AuthorYao, Baoli (yaobl@opt.ac.cn)
Affiliation1.State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China
2.School of Science, Xi'An Jiaotong University, Xi'an; 710049, China
3.University of Chinese Academy of Sciences, Beijing; 100049, China
4.Department of Bioengineering, Clemson University, Clemson-MUSC Bioengineering Program, Charleston; SC; 29425, United States
Recommended Citation
GB/T 7714
Li, Runze,Yu, Xianghua,Yang, Yanlong,et al. Engineering the on-axis intensity of Bessel beam by a feedback tuning loop[C]:SPIE,2018.
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