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调控矢量激光在湍流环境中的旋转多普勒测量

Rotating Doppler measurement of the manipulated vector laser in turbulent environment

  • 摘要: 实际环境中,大气湍流和不理想的目标会对旋转多普勒信号提取产生强烈干扰。为了从大气湍流等干扰中提取出有效的多普勒信号,采用多阶矢量涡旋光束偏振测量的方法,构建了基于矢量涡旋光束的抗湍流旋转多普勒测量系统,并研究了不同强度湍流环境下的旋转多普勒频移测量,成功得到了不同速度粗糙目标物有效的多普勒信号。结果表明,通过用5阶、10阶、15阶和20阶涡旋光束对不同湍流强度下两种角速度的测量,验证了复杂环境下利用偏振维度可以有效过滤湍流噪声影响,并实现对物体角速度的准确测量,同时较高阶数的涡旋光束更有利于提高测量系统在复杂环境中的鲁棒性。该研究为风能发电、气象预报、医学研究以及海洋大气等领域中在湍流环境下的数据监测提供了有效参考。

     

    Abstract: In practical environment, severe interference can be observed in the extraction of rotational Doppler signals due to atmospheric turbulence and non-ideal targets. In order to retrieve effective Doppler signals amidst such interference, a method of polarization measurement employing higher-order vector vortex beams was employed. Subsequently, a rotational Doppler measurement system with resistance to turbulence, founded on vector vortex beams, was established, enabling the determination of rotational Doppler shifts under varying turbulence intensities. Doppler signals for rough targets moving at diverse velocities were obtained successfully. Experimental findings suggest that, the measurement of two angular velocities under different turbulence intensities using the 5th, the 10th, the 15th, and the 20th order vortex beams validates that within intricate environments. Turbulence noise can be substantially filtered out through the utilization of the polarization dimension. Thus, the accurate measurement of the angular velocities of objects can be realized. Furthermore, higher-order vortex beams are more advantageous in enhancing the robustness of the measurement system in complex environments. This study offers invaluable references for data monitoring in turbulent environments across a spectrum of disciplines, encompassing wind power generation, weather forecasting, medical research, and marine and atmospheric sciences.

     

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