| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Transverse Propagation Characteristics and Coherent Effect of Gaussian Beams |
| Fei Xiang1, Lin Zhang2, Tao Chen1, Yuan-Hong Zhong3, Jin Li4** |
1State Grid Chongqing Electric Power Research Institute, Chongqing 401123, China
2State Grid Chongqing Electric Power Company, Chongqing 404000, China
3School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China
4College of Physics, Chongqing University, Chongqing 401331, China
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| Cite this article: |
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Fei Xiang, Lin Zhang, Tao Chen et al 2020 Chin. Phys. Lett. 37 064101 |
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Abstract As an important electromagnetic field in experiment, Gaussian beams have non-vanishing longitudinal electric and magnetic components that generate significant energy fluxes on transverse directions. We focus on the transverse energy flux and derive the theoretical propagation properties. Unlike the longitudinal energy flux, the transverse energy flux has many unique physical behaviors, such as the odd symmetry on propagation, slower decay rate on resonant condition. By means of the characteristics of transverse energy flux, it is feasible to find the suitable regions where the information of coherent lights could be extracted exactly. With the typical laser parameters, we simulate the energy fluxes on receiver surface and analyze the corresponding distribution for the coherent light beams. Especially for coherent lights, the transverse energy flux on the $y$–$z$ plane with $x=0$ and $x$–$z$ plane with $y=0$, contains pure coherent information. Meanwhile, in the transverse distance $|y| < 2W_{0}$ ($W_{0}$ is the waist radius) and $|x| < W_{0}/3$ the coherent information could also be extracted appropriately.
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Received: 10 March 2020
Published: 26 May 2020
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| PACS: |
41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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42.25.Dd
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(Wave propagation in random media)
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| Fund: *Supported by the National Natural Science Foundation of China (Grant No. 11873001) and the Natural Science Foundation of Chongqing (Grant No. cstc2018jcyjAX0767). |
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