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Proceedings Paper

Fabrication of large-aperture random phase plate for uniform illumination on laser fusion target
Author(s): Huijie Huang; Dunwu Lu; Runwen Wang; Yongkai Zhao; Zengshui Liu
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Paper Abstract

We have fabricated a large aperture random phase plate (RPP) in Chinese K9 glass substrate for target-plane laser beam smoothing at 1.06 micrometer wavelength, by using large aperture photolithography and dilute HF etching processes. The RPP's clear aperture is (phi) 250 mm. The measured average step height is 1.060 micrometer, which has a relative standard deviation of 1.24% at 5 locations on the RPP to the theoretical value. A focal spot with very sharp edges and nearly flat-top overall envelope intensity distribution is obtained at the focal-plane of a focusing lens. These results show that our fabrication techniques for RPP is effective, and is easily scaleable to even larger apertures.

Paper Details

Date Published: 3 April 2000
PDF: 6 pages
Proc. SPIE 3889, Advanced High-Power Lasers, (3 April 2000); doi: 10.1117/12.380867
Show Author Affiliations
Huijie Huang, Shanghai Institute of Optics and Fine Mechanics (China)
Dunwu Lu, Shanghai Institute of Optics and Fine Mechanics (China)
Runwen Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Yongkai Zhao, Shanghai Institute of Optics and Fine Mechanics (China)
Zengshui Liu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 3889:
Advanced High-Power Lasers
Marek Osinski; Howard T. Powell; Koichi Toyoda, Editor(s)

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