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首页> 外文会议>Conference on Free-Space Laser Communication Technology XV Jan 28, 2003 San Jose, California, USA >Spatially distributed algorithm for mitigation of atmospheric distortions of the laser beam
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Spatially distributed algorithm for mitigation of atmospheric distortions of the laser beam

机译：减轻激光光束的大气畸变的空间分布算法

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摘要

Development of long-range laser communication devices capable of operating within Earth's atmosphere is a challenging task. Turbulence effects cause changes of the refractive index, thus creating random redistribution of optical energy in the spatial domain and imposing performance limitations on the laser systems. A mathematical model describing effects of turbulence on the optical wave propagation, based on the Rytov approximation, is presented. A common method of mitigating these effects suggests dynamic wavefront control of the laser beam. In our approach this goal is achieved by placing an adjustable electrically addressed spatial light modulator in the transmitter output. A novel spatially distributed gradient minimization scheme is developed for calculating the required phase profiles. The resultant system is implemented in a simulation setup and tested for convergence, speed, robustness and the ability to reduce the scintillation effect. The paper presents the basic algorithm and demonstrates the results of its application.
机译：开发能够在地球大气层中运行的远程激光通信设备是一项艰巨的任务。湍流效应引起折射率的变化，从而在空间域中产生光能的随机重新分布，并对激光系统造成性能限制。提出了基于Rytov近似的湍流对光波传播影响的数学模型。减轻这些影响的常用方法建议对激光束进行动态波前控制。在我们的方法中，此目标是通过在发射器输出中放置可调的电寻址空间光调制器来实现的。开发了一种新颖的空间分布梯度最小化方案，用于计算所需的相位轮廓。生成的系统在仿真设置中实现，并测试了其收敛性，速度，鲁棒性和降低闪烁效应的能力。本文介绍了基本算法并演示了其应用结果。

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