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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
ISSN1054-660X
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.
DOI10.1088/1555-6611/aba1ea
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收录类别SCI ; EI
语种英语
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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
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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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