Wavefront Error Modeling and Control Method for Large Aperture Optical Unit in High Power Solid-State Laser

YAO Chao1 WANG Hui1 ZHANG Zheng1 LIU Tianye1

(1.Department of Mechanical Engineering, Tsinghua University, Beijing, China 100084)

【Abstract】The fine modeling analysis of wavefront error is carried out based on assembly structure and profile accuracy characteristic of typical large aperture laser transmission mirror in high power solid-state laser driver of inertial confinement fusion system. Wavefront error models of roughness, ripple and profile are studied. To control the wavefront error caused by mounting force in assembly process within a reasonable range, a method combined root-mean-square (RMS) gradient and peak-to-valley (PV) value is proposed. Experiments are carried out to verify the feasibility of the proposed method. The study provides scientific instruction for wavefront error control in assembly process of large aperture mirror in SG-III host device.

【Keywords】 lasers; high power solid-state laser; large aperture mirror; wavefront error; precision assembly; root-mean-square gradient;

【DOI】

【Funds】 National Natural Science Foundation of China (51575310)

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    References

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This Article

ISSN:0253-2239

CN: 31-1252/O4

Vol 37, No. 07, Pages 175-185

July 2017

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Article Outline

Abstract

  • 1 Introduction
  • 2 Fine representation of wavefront error of large aperture optical element
  • 3 Influence of mounting force on wavefront performance
  • 4 RMS gradient and wavefront error
  • 5 Experimental verification of wavefront error modeling
  • 6 Conclusions
  • References