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Proceedings Paper

Two-dimensional of uniform irradiation on target with the use of the concentricity deviation lens arrays focus system of variable focus length
Author(s): Jian-zhou Zheng; Qing-xu Yu; Yong-jun Lu; Shou-hua Guan; Bin Dong
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Paper Abstract

An optical system consisted of lens array with variable focus width has been proposed for providing uniform irradiation on targets in inertial confinement fusion. This system was composed of two lenses arrays and the aspheric lens. Based on the adaxial matrix optics and the generalized diffraction integral theory, the principle of controllable focus profile was analyzed and the optimum design of the system parameters were presented, respectively. The simulated results showed that two-dimensional uniform focusing of laser beams with controllable width in the range of several hundred microns to several millimeters can be achieved by choosing appropriate system parameters. The system converted a circular laser beam into a flat-top square focused spot, presenting the transformation of beamshape and the uniform distribution of the spatial intensity at the same time. Appropriate concentricity deviation of LA was made in the design of LA focus system, so that the diffraction patterns of different beamlets did not completely overlap and the large-scale intensity fluctuation reduced effectively, and a well-irradiated laser spot and great energy efficiency can be obtained in this scheme.

Paper Details

Date Published: 16 October 2012
PDF: 8 pages
Proc. SPIE 8416, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 84162A (16 October 2012); doi: 10.1117/12.975795
Show Author Affiliations
Jian-zhou Zheng, Dalian Nationalities Univ. (China)
Dalian Univ. of Technology (China)
Qing-xu Yu, Dalian Univ. of Technology (China)
Yong-jun Lu, Dalian Nationalities Univ. (China)
Shou-hua Guan, Dalian Nationalities Univ. (China)
Dalian Univ. of Technology (China)
Bin Dong, Dalian Nationalities Univ. (China)


Published in SPIE Proceedings Vol. 8416:
6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Eric Ruch; Shengyi Li, Editor(s)

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