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Proceedings Paper

Division of aperture to reduce the focus spot size
Author(s): Liangyu Li; Changchun Li; Huajun Yang; Yinzhu Li; Yaping Dai; Hu Xie; Gongyu Wang; Jianqiang Zhu
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Paper Abstract

In the investigation of Inertial Confinement Fusion (ICF), the high power laser beam must be focused on the target (focus plane) given. In the ICF indirect drivers, the target fixed in a cavity is cylinderal, there are the Deuterium and the Tritium in the target, the experiment result relatives with the temperature radiated in the cavity, and the temperature relatives with the laser energy power incided. Thus, it is key that there must be enough of energy incided, and the energy runs out barely. So, to increase the laser energy incided, the focus spot should be very small. Base on the design of focus optical systems of the SHENGUANG serial facilities and the theory analyses, as the diffraction of the light, the laser beam passing through the optical systems gets a spot on the focus plane. In order to reduce the edge of the main spot or the focus spot size, we advance a method of dividing aperture of the focusing optical system, the diffraction theory of light shows that the diffraction main spot is reduced, it indicates that the method of dividing the aperture may be recommended.

Paper Details

Date Published: 6 October 2000
PDF: 5 pages
Proc. SPIE 4231, Advanced Optical Manufacturing and Testing Technology 2000, (6 October 2000); doi: 10.1117/12.402765
Show Author Affiliations
Liangyu Li, Shanghai Institute of Optics and Fine Mechanics (China)
Changchun Li, Chongqing Communication Institute (China)
Huajun Yang, Univ. of Electronic Science and Technology of China (China)
Yinzhu Li, Shanghai Institute of Optics and Fine Mechanics (China)
Yaping Dai, Shanghai Institute of Optics and Fine Mechanics (China)
Hu Xie, Shanghai Institute of Optics and Fine Mechanics (China)
Gongyu Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Jianqiang Zhu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 4231:
Advanced Optical Manufacturing and Testing Technology 2000
Li Yang; Harvey M. Pollicove; Qiming Xin; James C. Wyant, Editor(s)

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