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Proceedings Paper

Wavefront pre-compensation for thermal deformations in a beam control system
Author(s): Qiong Zhou; Zongfu Jiang; Fengjie Xi; Liang Liu
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Paper Abstract

A simple way to approach the problem of counteracting the phase aberrations induced by thermal deformations in a beam control system is advanced and the influence of wavefront pre-compensation on correcting the phase shifts is proved by experiments. The thermal deformations of a Si reflector irradiated by a circle-sharp laser beam are simulated, and the phase aberrations of emitted laser are calculated. In order to overcome the effects of phase aberrations, the conjugation wavefront pre-compensation of incident laser is studied theoretically and experimentally. There are three works in this paper. Firstly, the thermal deformation of a mirror was simulated by using ANSYS Mechanical APDL application. Secondly, on the base that the phase shifts has been calculated, the complex amplitude distribution of the outgoing laser was calculated by using a space ray method of geometrical optics and light diffraction theory. Finally, the influence of wavefront pre-compensation on emitted laser had studied experimentally with a scaled model in laboratory. The results show that the uneven distribution of phase shifts which is induced by inhomogenous thermal deformations greatly distorts the wavefront of the emitted laser. The beam quality of emitted laser has been ameliorated when a conjugation phase is been placed on the incident beam.

Paper Details

Date Published: 19 August 2011
PDF: 8 pages
Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81920Q (19 August 2011); doi: 10.1117/12.899106
Show Author Affiliations
Qiong Zhou, National Univ. of Defense Technology (China)
Zongfu Jiang, National Univ. of Defense Technology (China)
Fengjie Xi, National Univ. of Defense Technology (China)
Liang Liu, Naval Aeronautical and Astronautical Univ. (China)


Published in SPIE Proceedings Vol. 8192:
International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging
Farzin Amzajerdian; Weibiao Chen; Chunqing Gao; Tianyu Xie, Editor(s)

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