Simulation and compensation of wavefront aberration caused by deformable mirror thermal deformation

Niu Zhifeng; Guo Jianzeng; Zhou Xiaohong

doi:10.11884/HPLPB201527.011010

Volume 27 Issue 01

Jan. 2015

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Niu Zhifeng, Guo Jianzeng, Zhou Xiaohong. Simulation and compensation of wavefront aberration caused by deformable mirror thermal deformation[J]. High Power Laser and Particle Beams, 2015, 27: 011010. doi: 10.11884/HPLPB201527.011010

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Niu Zhifeng, Guo Jianzeng, Zhou Xiaohong. Simulation and compensation of wavefront aberration caused by deformable mirror thermal deformation[J]. High Power Laser and Particle Beams, 2015, 27: 011010. doi: 10.11884/HPLPB201527.011010

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Simulation and compensation of wavefront aberration caused by deformable mirror thermal deformation

doi: 10.11884/HPLPB201527.011010

1.
718th Research Institute of China Shipbuilding Industry Corporation,Handan 056027,China

Received Date: 2014-06-26
Rev Recd Date: 2014-10-30
Publish Date: 2015-01-20

Abstract

Abstract

The thermo-mechanical model of the deformable mirror based on ANSYS multiphysics is provided and calculated. High energy laser radiation results in a mirror deformation of about 0.9 m. Therefore, according to the characteristic distribution of the thermally-induced deformation, a compensation method is proposed. The compensation mirror, placed in the optical path after the deformable mirror, is composed of a thin mirror and some restriction parts. By contrast with the poles of the deformable mirror, the restriction parts of the compensation mirror are installed in a staggered order. Three types of compensation mirrors with different shapes of restriction parts are calculated. The results show that the values of the thermal deformation reduce to 0.35 m, 0.32 m and 0.40 m. Using the BPF (beam propagation factor) to evaluate the compensation effect, the results indicate that the BPF value increases from 0.906 to 0.966, 0.971 and 0.957. Further calculations show that the size of the restriction parts has little effect on the compensation effect.
- deformable mirror,
- thermal deformation,
- wavefront aberration compensation,
- high energy laser radiation,
- compensation mirror

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