Effects of Anisotropic Turbulence on Propagation Characteristics of Partially Coherent Beams with Spatially Varying Coherence
Based on the extended Huygens-Fresnel (eHF) principle, approximate analytical expressions for the spectral density of nonuniformly correlated (NUC) beams are derived with the help of discrete model decompositions. The beams are propagating along horizontal paths through an anisotropic turbulent medi...
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| Format: | Article |
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MDPI AG
2018-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/8/11/2025 |
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| author | Wentao Dao Chunhao Liang Fei Wang Yangjian Cai Bernhard J. Hoenders |
| author_facet | Wentao Dao Chunhao Liang Fei Wang Yangjian Cai Bernhard J. Hoenders |
| author_sort | Wentao Dao |
| collection | DOAJ |
| description | Based on the extended Huygens-Fresnel (eHF) principle, approximate analytical expressions for the spectral density of nonuniformly correlated (NUC) beams are derived with the help of discrete model decompositions. The beams are propagating along horizontal paths through an anisotropic turbulent medium. Based on the derived formula, the influence of the anisotropic turbulence (anisotropy factors, structure parameters) on the evolution of the average intensity, the shift of the intensity maxima and the power-in-the-bucket (PIB) are investigated in detail through numerical examples. It is found that the lateral shifting of the intensity maxima is closely related to the anisotropy factors and the strength of turbulence. Our results also reveal that, in the case of weak turbulence, the beam profile can retain the feature of local intensity sharpness, but this feature degenerates quickly if the strength of the turbulence increases. The value of <i>PIB</i> of the NUC beams can be even higher than that of Gaussian beams by appropriately controlling the coherence parameter in the weak turbulence regime. This feature makes the NUC beams useful for free-space communication. |
| first_indexed | 2024-12-20T04:38:29Z |
| format | Article |
| id | doaj.art-48ee8bfcf18e4351984f4d0176e5abb5 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-20T04:38:29Z |
| publishDate | 2018-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-48ee8bfcf18e4351984f4d0176e5abb52022-12-21T19:53:11ZengMDPI AGApplied Sciences2076-34172018-10-01811202510.3390/app8112025app8112025Effects of Anisotropic Turbulence on Propagation Characteristics of Partially Coherent Beams with Spatially Varying CoherenceWentao Dao0Chunhao Liang1Fei Wang2Yangjian Cai3Bernhard J. Hoenders4School of Physical Science and Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, ChinaSchool of Physical Science and Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, ChinaSchool of Physical Science and Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, ChinaSchool of Physical Science and Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, ChinaFaculty of Science and Engineering, University of Groningen, Nijenborg 4, 9747 AG Groningen, The NetherlandsBased on the extended Huygens-Fresnel (eHF) principle, approximate analytical expressions for the spectral density of nonuniformly correlated (NUC) beams are derived with the help of discrete model decompositions. The beams are propagating along horizontal paths through an anisotropic turbulent medium. Based on the derived formula, the influence of the anisotropic turbulence (anisotropy factors, structure parameters) on the evolution of the average intensity, the shift of the intensity maxima and the power-in-the-bucket (PIB) are investigated in detail through numerical examples. It is found that the lateral shifting of the intensity maxima is closely related to the anisotropy factors and the strength of turbulence. Our results also reveal that, in the case of weak turbulence, the beam profile can retain the feature of local intensity sharpness, but this feature degenerates quickly if the strength of the turbulence increases. The value of <i>PIB</i> of the NUC beams can be even higher than that of Gaussian beams by appropriately controlling the coherence parameter in the weak turbulence regime. This feature makes the NUC beams useful for free-space communication.https://www.mdpi.com/2076-3417/8/11/2025nonuniformly correlated beamscoherenceatmospheric turbulence |
| spellingShingle | Wentao Dao Chunhao Liang Fei Wang Yangjian Cai Bernhard J. Hoenders Effects of Anisotropic Turbulence on Propagation Characteristics of Partially Coherent Beams with Spatially Varying Coherence Applied Sciences nonuniformly correlated beams coherence atmospheric turbulence |
| title | Effects of Anisotropic Turbulence on Propagation Characteristics of Partially Coherent Beams with Spatially Varying Coherence |
| title_full | Effects of Anisotropic Turbulence on Propagation Characteristics of Partially Coherent Beams with Spatially Varying Coherence |
| title_fullStr | Effects of Anisotropic Turbulence on Propagation Characteristics of Partially Coherent Beams with Spatially Varying Coherence |
| title_full_unstemmed | Effects of Anisotropic Turbulence on Propagation Characteristics of Partially Coherent Beams with Spatially Varying Coherence |
| title_short | Effects of Anisotropic Turbulence on Propagation Characteristics of Partially Coherent Beams with Spatially Varying Coherence |
| title_sort | effects of anisotropic turbulence on propagation characteristics of partially coherent beams with spatially varying coherence |
| topic | nonuniformly correlated beams coherence atmospheric turbulence |
| url | https://www.mdpi.com/2076-3417/8/11/2025 |
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