Simulation of defocusing effect based on two-step ABCD algorithm while a modal decomposition

doi:10.1088/1555-6611/aba1ea

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	Simulation of defocusing effect based on two-step ABCD algorithm while a modal decomposition
	Y. Y. Zhang,T. F. Wang,L. S. Liu,Y. Y. Li and J. Guo
	2020
发表期刊	Laser Physics
ISSN	1054-660X
卷号	30 期号:10 页码:11
摘要	Depicting the multimode laser beam by modal decomposition can potentially assess light field variations in the fiber, during propagation. The practical engineering conditions in the lab however could not realize ideal levels, hence further research on factors influencing this method, such as defocus, is especially necessitated. The grid spacing in observation plane by Fast Fourier Transform is fixed and unchangeable within diffraction imaging, hence possibly yielding erroneous data during obtaining light field intensities. Our research resolves these issues via a Two-step ABCD algorithm, applied in the modal decomposition to characterize various guided modes at the output of multimode fibers. A direct benefit is that the image plane size can be altered, further refining laser facula clarity. Furthermore, the quantitative expressions that analyze defocus factors impacting modal decomposition are acquired. The conclusions thereby prove the modal decomposition algorithm can keep effectiveness in the range of -0.25% to 0.25% of relative defocus for low order eigenmodes, having no suitable limited band for high order eigenmodes, with reference value in engineering applications.
DOI	10.1088/1555-6611/aba1ea
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收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/64883
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Y. Y. Zhang,T. F. Wang,L. S. Liu,Y. Y. Li and J. Guo. Simulation of defocusing effect based on two-step ABCD algorithm while a modal decomposition[J]. Laser Physics,2020,30(10):11.
APA	Y. Y. Zhang,T. F. Wang,L. S. Liu,Y. Y. Li and J. Guo.(2020).Simulation of defocusing effect based on two-step ABCD algorithm while a modal decomposition.Laser Physics,30(10),11.
MLA	Y. Y. Zhang,T. F. Wang,L. S. Liu,Y. Y. Li and J. Guo."Simulation of defocusing effect based on two-step ABCD algorithm while a modal decomposition".Laser Physics 30.10(2020):11.

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