Diffraction characteristics of serrated circular aperture with random radius

Wang Jinguo; Zhu Zhanda; Sun Zhe; Hui Yongling; Lei Hong; Li Qiang

doi:10.3788/HPLPB20122408.1801

Volume 24 Issue 08

Nov. 2012

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Article Navigation > High Power Laser and Particle Beams > 2012 > 24(08): 1801-1805

Chen Ying. Three-dimensional numerical simulation on 15~20 mA H- cusp source[J]. High Power Laser and Particle Beams, 2014, 26: 014001. doi: 10.3788/HPLPB201426.014001

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Wang Jinguo, Zhu Zhanda, Sun Zhe, et al. Diffraction characteristics of serrated circular aperture with random radius[J]. High Power Laser and Particle Beams, 2012, 24: 1801-1805. doi: 10.3788/HPLPB20122408.1801

Chen Ying. Three-dimensional numerical simulation on 15~20 mA H- cusp source[J]. High Power Laser and Particle Beams, 2014, 26: 014001. doi: 10.3788/HPLPB201426.014001

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Diffraction characteristics of serrated circular aperture with random radius

doi: 10.3788/HPLPB20122408.1801

1.
Institute of Laser Engineering,Beijing University of Technology,Beijing 100124,China

Received Date: 2012-01-12
Publish Date: 2012-08-15

Abstract

Abstract

This paper studies the diffraction characteristics of a serrated circular aperture with random radius, and puts forward and proves that the aperture can further improve the near-field distribution of the beam and reduce the diffraction modulation in the beam center. The simulation results of the axial diffraction and the intensity distribution in the cross section are given, which shows the diffraction light after this aperture has higher filling factor and lower modulation rate compared with that after the amplitude modulation serrated aperture. The intensity modulation of Fresnel diffraction on the axis is suppressed by using the random radius serrated aperture in larger space. The farthest range of suppression can reach 0.15 m.
- randomradiusserratedaperture,
- amplitudemodulationserratedaperture,
- modulationlarge-scalediffraction,
- fillingfactor

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