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Proceedings Paper

Design and fabrication of fused silica grating with shallow groove for energy measurement of high-energy pulse laser
Author(s): Chaoming Li; Xinrong Chen; Jianhong Wu; Quan Liu; Zuyuan Hu
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Paper Abstract

Energy measurement is one of the important issues in the laser inertial confinement fusion (ICF) system. The accurate energy information of the high-energy pulse laser should be obtained before the laser reaches the targets and at the same time the properties of the shooting laser should not be interferenced obviously by the measuring device used in the measurement of high-energy pulse laser. This paper presents a method of measuring the pulse laser with high energy by means of diffraction grating with high damage threshold based on fused silica substrate. By measuring the 1st diffracted light which plays the role of the sampling beam, the energy of shooting laser is obtained indirectly. According to the requirement of the optical measurement system, the holographic recording system of fabricating fused silica grating with 330mm×330mm aperture is designed reasonably. This sort of beam sampling grating can eliminate the off-axial aberrations of the target lens. After the aberration correction, the diameter of the sampling focal-spot is less than 0.3mm. In order to meet the actual needs of the efficiency of energy sampling, the parameters of the fused silica grating with shallow groove are designed and it realizes 0.2% of sampling efficiency. This fused silica grating with shallow groove has been applied in a practical high-energy laser system and the experimental results show that the energy sampling efficiency and sampling focal-spot are consistent with the theoretical design and fit for the engineering requirements.

Paper Details

Date Published: 6 October 2010
PDF: 6 pages
Proc. SPIE 7655, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 76551U (6 October 2010); doi: 10.1117/12.867468
Show Author Affiliations
Chaoming Li, Soochow Univ. (China)
Xinrong Chen, Soochow Univ. (China)
Jianhong Wu, Soochow Univ. (China)
Quan Liu, Soochow Univ. (China)
Zuyuan Hu, Soochow Univ. (China)


Published in SPIE Proceedings Vol. 7655:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Yoshiharu Namba; David D. Walker; Shengyi Li, Editor(s)

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