Two-dimensional of uniform irradiation on target with the use of the concentricity deviation lens arrays focus system of variable focus length

Jian-zhou Zheng; Qing-xu Yu; Yong-jun Lu; Shou-hua Guan; Bin Dong

doi:10.1117/12.975795

16 October 2012 Two-dimensional of uniform irradiation on target with the use of the concentricity deviation lens arrays focus system of variable focus length

Jian-zhou Zheng, Qing-xu Yu, Yong-jun Lu, Shou-hua Guan, Bin Dong

Author Affiliations +

Proceedings Volume 8416, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 84162A (2012) https://doi.org/10.1117/12.975795
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

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.

Citation Download Citation

Jian-zhou Zheng, Qing-xu Yu, Yong-jun Lu, Shou-hua Guan, and Bin Dong "Two-dimensional of uniform irradiation on target with the use of the concentricity deviation lens arrays focus system of variable focus length", Proc. SPIE 8416, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 84162A (16 October 2012); https://doi.org/10.1117/12.975795

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