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Proceedings Paper

Calculating Strehl ratio through radial shearing method
Author(s): Yuanbiao Lu; Yongying Yang; Yangjie Chen; Yongmo Zhuo
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Paper Abstract

The approximate Strehl Ratio expressions that need only the wave phase distribution is not appropriate in the laser fusion system when the phase has great aberration. The accurate Strehl Ratio value need both the phase and the amplitude distribution information. The paper provide a method of reconstructing wave phase and amplitude distribution by a single radial shearing interferogram. The radial shearing interferometer based on spatial phase modulation is simple and stable, needs only one interferogram. The principle and structure of cyclic radial shearing interferometer are briefly discussed and the process of spatial phase modulation, Fourier transform method and wavefront reconstruction are analyzed. It also illluminates the physical meaning and establish the mathematical model. The process of getting SR value is simulated by computer. The simulation result indicates that the RMS error of the reconstructing wavefront can achieve λ/100.

Paper Details

Date Published: 10 February 2005
PDF: 10 pages
Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); doi: 10.1117/12.572570
Show Author Affiliations
Yuanbiao Lu, Zhejiang Univ. (China)
Yongying Yang, Zhejiang Univ. (China)
Yangjie Chen, Zhejiang Univ. (China)
Yongmo Zhuo, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 5638:
Optical Design and Testing II
Yongtian Wang; Zhicheng Weng; Shenghua Ye; Jose M. Sasian, Editor(s)

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