高能激光光束质量<i>β</i>因子的影响因素分析

王艳茹; 王建忠; 冉铮惠; 丁宇洁

doi:10.37188/CO.2020-0137

Volume 14 Issue 2

Mar. 2021

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Chinese Optics > 2021 > 14(2): 353-360.

WANG Yan-ru, WANG Jian-zhong, RAN Zheng-hui, DING Yu-jie. Analysis of effects on the beam quality β factor of high power laser[J]. Chinese Optics, 2021, 14(2): 353-360. doi: 10.37188/CO.2020-0137

Citation:

WANG Yan-ru, WANG Jian-zhong, RAN Zheng-hui, DING Yu-jie. Analysis of effects on the beam quality β factor of high power laser[J]. Chinese Optics, 2021, 14(2): 353-360. doi: 10.37188/CO.2020-0137

WANG Yan-ru, WANG Jian-zhong, RAN Zheng-hui, DING Yu-jie. Analysis of effects on the beam quality β factor of high power laser[J]. Chinese Optics, 2021, 14(2): 353-360. doi: 10.37188/CO.2020-0137

Citation:

WANG Yan-ru, WANG Jian-zhong, RAN Zheng-hui, DING Yu-jie. Analysis of effects on the beam quality β factor of high power laser[J]. Chinese Optics, 2021, 14(2): 353-360. doi: 10.37188/CO.2020-0137

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Analysis of effects on the beam quality β factor of high power laser

doi: 10.37188/CO.2020-0137

Metrology and Testing Center, China Academy of Engineering Physics, Mianyang 621900, China

Funds: Supported by Basic Project of Science Technology and Industry for National Defense (No. JSJL2017212B002)

More Information

Corresponding author: WJLZ1999@sina.com
Received Date: 27 Jul 2020
Rev Recd Date: 15 Aug 2020

Available Online: 05 Feb 2021

Publish Date: 23 Mar 2021

Abstract

Abstract

The influencing factors of beam quality β factor of high-energy laser system is analyzed based on two-dimension chirp z transformation. The effects of the sampling number within the diffraction limit and the beam spot’s energy loss on the beam quality β factor are analyzed. The simulation results based on different sampling numbers indicate that a larger sampling number induces higher beam spot diffraction image resolution which is beneficial for more accurate calculation of a beam quality β factor. When the sampling number of the diffraction limit angle is no less than ten, the measurement error can be limited within 3%. Meanwhile, different wavefront aberrations have different sensitivities against beam spot energy loss. The beam quality β factor of high order wavefront aberration is larger than that of low order aberration with equal energy loss. Especially, the spherical aberration is most sensitive to energy loss, and about 5% energy loss can induce 15% to 30% calculation error of the β factor.
- chirp z transformation,
- beam quality,
- β factor,
- sampling number,
- energy loss

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References(15)

References

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