本文選題：物理光學(xué) + 慧差��； 參考：《中國(guó)激光》2017年08期

【摘要】：隨著水下光通信、傳感和激光雷達(dá)等技術(shù)的快速發(fā)展,深入研究海洋湍流對(duì)光束傳輸特性的影響具有重要的意義。采用數(shù)值模擬方法研究了慧差光束通過(guò)海洋湍流的傳輸特性。研究結(jié)果表明:海洋湍流會(huì)導(dǎo)致光束慧形分布消失;慧差光束的質(zhì)心位置與最大光強(qiáng)位置不重合;相比于以最大光強(qiáng)位置為中心,以光束質(zhì)心位置為中心時(shí)計(jì)算得到的束寬要小,但其受海洋湍流影響更大;以能量Strehl比作為評(píng)價(jià)參數(shù)時(shí),慧差越嚴(yán)重,則光束能量集中度受海洋湍流影響越小;以β參數(shù)作為評(píng)價(jià)參數(shù)時(shí),當(dāng)慧差系數(shù)取某特定值時(shí),光束能量集中度受海洋湍流的影響最大,在實(shí)際應(yīng)用中應(yīng)該避免這種情況。能量Strehl比與β參數(shù)的物理含義不同,按照給定桶半徑內(nèi)所含能量定義的能量集中度(能量Strehl比)與按照給定桶中功率百分比定義的能量集中度(β參數(shù))受海洋湍流的影響是不同的,這在實(shí)際應(yīng)用中應(yīng)當(dāng)特別注意。
[Abstract]:With the rapid development of underwater optical communication, sensing and lidar, it is of great significance to study the influence of ocean turbulence on beam propagation. Numerical simulation is used to study the propagation characteristics of the oblique beam through ocean turbulence. The results show that ocean turbulence will lead to the disappearance of the beam shape distribution, the mismatch between the center of mass of the beam and the position of the maximum light intensity, and the difference between the position of the center of mass and the position of the maximum light intensity. When the beam center is centered on the center of the beam, the beam width is smaller, but it is more affected by the ocean turbulence, and when the energy Strehl ratio is used as the evaluation parameter, the more serious the wisdom difference is, the less the influence of ocean turbulence on the energy concentration of the beam is. When 尾 parameter is used as the evaluation parameter, the energy concentration of the beam is most affected by ocean turbulence when the coefficient of wisdom difference is taken as a certain value, which should be avoided in practical application. The physical meaning of the energy Strehl ratio is different from that of the 尾 parameter. The energy concentration (energy Strehl ratio) defined according to the given barrel radius is different from the energy concentration (尾 parameter) defined by the given bucket power percentage, which should be paid special attention in practical application.
【作者單位】： 四川師范大學(xué)物理與電子工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(61475105)
【分類號(hào)】：O43

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本文編號(hào)：1812742