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Proceedings Paper

Speckle smoothing using polarization control plate made of liquid crystal
Author(s): Keiichi Sueda
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Paper Abstract

In the direct drive laser fusion, the smoothness of the intensity distribution of illuminating beam has been improved by the use of the random phase plate (RPP). A laser beam through the RPP is divided into many small beamlets and then piled up at a target plane with a focusing lens. The RPP reduces the nonuniformity of spatial phase and intensity distributions in a far field. However, the intensity distribution in a far field region consists of fully developed speckles due to random interference. Such fine structures cause an imprinting on the target surface, although the intensity envelope is relatively uniform. Therefore, we are investigating the polarization control for the instantaneous speckle smoothing to overcome this problems[1].

Paper Details

Date Published: 1 September 1996
PDF: 2 pages
Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 277830 (1 September 1996); doi: 10.1117/12.2298990
Show Author Affiliations
Keiichi Sueda, Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 2778:
17th Congress of the International Commission for Optics: Optics for Science and New Technology
Joon-Sung Chang; Jai-Hyung Lee; ChangHee Nam, Editor(s)

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