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
Xiangmei Zeng(曾祥梅), Meizhi Zhang(张美志), Dongmei Cao(曹冬梅), Dingyu Sun(孙鼎宇), Hua Zhou(周花)
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
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.
中图分类号: (Modulation, tuning, and mode locking)