Fitting relationship between the beam quality β factor of high-energy laser and the wavefront aberration of laser beam

Zhong-Ye Ji; Xiao-Fang Zhang

doi:10.1117/12.2294622

12 January 2018 Fitting relationship between the beam quality β factor of high-energy laser and the wavefront aberration of laser beam

Zhong-Ye Ji, Xiao-Fang Zhang

Author Affiliations +

Proceedings Volume 10619, 2017 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications; 106190J (2018) https://doi.org/10.1117/12.2294622
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

Abstract

The mathematical relation between the beam quality β factor of high-energy laser and the wavefront aberration of laser beam is important in beam quality control theory of the high-energy laser weapon system. In order to obtain this mathematical relation, numerical simulation is used in the research. Firstly, the Zernike representations of typically distorted atmospheric wavefront aberrations caused by the Kolmogoroff turbulence are generated. And then, the corresponding beam quality β factors of the different distorted wavefronts are calculated numerically through fast Fourier transform. Thus, the statistical distribution rule between the beam quality β factors of high-energy laser and the wavefront aberrations of the beam can be established by the calculated results. Finally, curve fitting method is chosen to establish the mathematical fitting relationship of these two parameters. And the result of the curve fitting shows that there is a quadratic curve relation between the beam quality β factor of high-energy laser and the wavefront aberration of laser beam. And in this paper, 3 fitting curves, in which the wavefront aberrations are consisted of Zernike Polynomials of 20, 36, 60 orders individually, are established to express the relationship between the beam quality β factor and atmospheric wavefront aberrations with different spatial frequency.

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Zhong-Ye Ji and Xiao-Fang Zhang "Fitting relationship between the beam quality β factor of high-energy laser and the wavefront aberration of laser beam", Proc. SPIE 10619, 2017 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 106190J (12 January 2018); https://doi.org/10.1117/12.2294622

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