M2-factor of high-power laser beams through a multi-apertured ABCD optical system

doi:10.1088/1674-1056/ab81f1

中国物理B ›› 2020, Vol. 29 ›› Issue (6): 64206-064206.doi: 10.1088/1674-1056/ab81f1

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

M²-factor of high-power laser beams through a multi-apertured ABCD optical system

Xiangmei Zeng(曾祥梅), Meizhi Zhang(张美志), Dongmei Cao(曹冬梅), Dingyu Sun(孙鼎宇), Hua Zhou(周花)

1 School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China;
2 School of Physics and Electronic Information, Yanan Univeristiy, Yanan 716000, China

收稿日期:2019-08-20 修回日期:2020-02-04 出版日期:2020-06-05 发布日期:2020-06-05
通讯作者: Xiangmei Zeng E-mail:xmzz79@163.com
基金资助:
Project supported by the Science Fund from the Shaanxi Provincial Education Department, China (Grant No. 18JK0723).

M²-factor of high-power laser beams through a multi-apertured ABCD optical system

Xiangmei Zeng(曾祥梅)¹, Meizhi Zhang(张美志)¹, Dongmei Cao(曹冬梅)², Dingyu Sun(孙鼎宇)¹, Hua Zhou(周花)¹

1 School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China;
2 School of Physics and Electronic Information, Yanan Univeristiy, Yanan 716000, China

Received:2019-08-20 Revised:2020-02-04 Online:2020-06-05 Published:2020-06-05
Contact: Xiangmei Zeng E-mail:xmzz79@163.com
Supported by:
Project supported by the Science Fund from the Shaanxi Provincial Education Department, China (Grant No. 18JK0723).

摘要/Abstract

摘要： Based on the generalized truncated second-order moments, an approximate analytical formula of the beam propagation factor M² of high-power laser beams passing through the optical system with multiple hard-edged apertures is deduced. Numerical examples of the beams passing through an aperture-spatial filter are enclosed, and the influences of amplitude modulations (AMs) and phase fluctuations (PFs) on the beam propagation quality of high-power laser beams passing through the multi-apertured ABCD optical system are considered and discussed. It is shown that PFs are able to degrade the beam propagation quality of laser beams more than AMs when the high-power laser beams passing through the aperture-spatial filter, furthermore, one or two aperture-lens optical systems configured appropriate aperture parameters are both able to upgrade the beam propagation quality of high-power laser beams. The M² factor of Gaussian beam passing through the multi-aperture optical system is a special case in this paper.

关键词: amplitude modulations (AMs), phase fluctuations (PFs), multiple hard-edged aperture, beam propagation factor

Abstract: Based on the generalized truncated second-order moments, an approximate analytical formula of the beam propagation factor M² of high-power laser beams passing through the optical system with multiple hard-edged apertures is deduced. Numerical examples of the beams passing through an aperture-spatial filter are enclosed, and the influences of amplitude modulations (AMs) and phase fluctuations (PFs) on the beam propagation quality of high-power laser beams passing through the multi-apertured ABCD optical system are considered and discussed. It is shown that PFs are able to degrade the beam propagation quality of laser beams more than AMs when the high-power laser beams passing through the aperture-spatial filter, furthermore, one or two aperture-lens optical systems configured appropriate aperture parameters are both able to upgrade the beam propagation quality of high-power laser beams. The M² factor of Gaussian beam passing through the multi-aperture optical system is a special case in this paper.

Key words: amplitude modulations (AMs), phase fluctuations (PFs), multiple hard-edged aperture, beam propagation factor

中图分类号: (Modulation, tuning, and mode locking)

42.60.Fc

42.55.-f (Lasers) 42.79.Ag (Apertures, collimators) 42.60.Fc (Modulation, tuning, and mode locking)

曾祥梅, 张美志, 曹冬梅, 孙鼎宇, 周花. M²-factor of high-power laser beams through a multi-apertured ABCD optical system[J]. 中国物理B, 2020, 29(6): 64206-064206.

Xiangmei Zeng(曾祥梅), Meizhi Zhang(张美志), Dongmei Cao(曹冬梅), Dingyu Sun(孙鼎宇), Hua Zhou(周花). M²-factor of high-power laser beams through a multi-apertured ABCD optical system[J]. Chin. Phys. B, 2020, 29(6): 64206-064206.

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M²-factor of high-power laser beams through a multi-apertured ABCD optical system

M²-factor of high-power laser beams through a multi-apertured ABCD optical system

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