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| 突然自聚焦光在大气湍流传输的性质研究 |
| Study on the properties of abruptly autofocusing beam propagation in atmospheric turbulence |
| 投稿时间：2025-01-13 |
| DOI：10.3969/j.issn.1005-5630.202501130005 |
| 中文关键词: 大气湍流相位屏 Kolmogorov湍流理论 突然自聚焦光束 次谐波补偿 光束畸变 |
| 英文关键词:atmospheric turbulence phase screen Kolmogorov turbulence theory abruptly autofocusing beam subharmonic compensation beam distortion |
| 基金项目:上海市自然科学基金（21ZR1443800） |
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| 中文摘要: |
| 光束在大气湍流中传输时受到的干扰会使光束形状发生畸变，光强迅速减弱，从而影响光信号的传输。自聚焦光束能在传输过程中进行自聚焦，在焦点位置产生极强的光斑。这一特性对光束在大气湍流或其他复杂介质中的传播研究具有重要意义。对比研究了圆环形艾里光束和啁啾环形Airyprime光束，这两种突然自聚焦光束在不同湍流强度条件下的传输性质。利用Kolmogorov湍流理论产生大气湍流相位屏，并采用次谐波补偿法改善相位屏低频信息。仿真结果表明，在相同湍流强度条件下，啁啾环形Airyprime光束焦点光强峰值衰减大于圆环形艾里光束，这是因为啁啾环形Airyprime光束具有更复杂的光场结构。此外，在大气湍流传输过程中，其光束畸变程度大于圆环形艾里光束。 |
| 英文摘要: |
| A light beam can be distorted and experience rapid intensity attenuation, thereby impairing the transmission of optical signals, during propagation through atmospheric turbulence. An autofocusing beam demonstrates autofocusing during propagation, producing an extremely intense spot at its focal point. This property plays a vital role in the study of beam propagation through atmospheric turbulence or other complex media. The transmission properties of two abruptly autofocusing beams, circular Airy beams and chirped ring Airyprime beams, were compared under different turbulence intensities. The Kolmogorov turbulence theory was used to generate the atmospheric turbulence phase screen, and the subharmonic compensation method was employed to improve their low-frequency information. Simulation results indicated that under identical turbulence intensity conditions, the chirped ring Airyprime beam exhibited greater attenuation in its focal spot intensity peak compared to the circular Airy beam, owing to its more complex optical field structure. Furthermore, it exhibited more severe beam distortion than the circular Airy beam, during propagation through atmospheric turbulence. |
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