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6 October 2000 Division of aperture to reduce the focus spot size
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Proceedings Volume 4231, Advanced Optical Manufacturing and Testing Technology 2000; (2000)
Event: International Topical Symposium on Advanced Optical Manufacturing and Testing Technology, 2000, Chengdu, China
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.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Liangyu Li, Changchun Li, Huajun Yang, Yinzhu Li, Yaping Dai, Hu Xie, Gongyu Wang, and Jianqiang Zhu "Division of aperture to reduce the focus spot size", Proc. SPIE 4231, Advanced Optical Manufacturing and Testing Technology 2000, (6 October 2000);

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