摘要
大部分激光器产生的激光为相干光束,在理想环境下,激光到达远场后其相干特性与出射时保持一致,且光强分布均匀,但由于大气环境中湍流的存在,激光到达远场后发生相互干涉,产生振幅起伏,即光强闪烁现象。文中主要从多个角度分析该现象形成的原因,并主要从相位、偏振态两个方面出发,提出相应的解决措施,并完成验证实验。实验结果表明,所提出的解决措施可实现较好的分布效果;又从理论方面提出了光源光束整形措施,提升激光远场光斑分布的性能;最后结合实际应用,分析了高空相对于地面大气湍流的区别,以及激光传输角度对激光远场传输的影响。从实际应用方面,涵盖针对激光远场大气传输能量稳定性的多项解决方案,用于指导启发同领域内相关技术的攻关,具体问题可根据文中原理内容提出具体实现方式。
The laser generated by most lasers is a coherent beam.In an ideal environment,the coherence char-acteristics of the laser after it reaches the far field are consistent with that of the laser when it exits,and the light in-tensity distribution is uniform.However,due to the existence of turbulence in the atmospheric environment,the in-terference occurs after the laser reaches the far field,resulting in amplitude fluctuation,that is,the phenomenon of light intensity flicker.The causes of the phenomenon are analyzed from many angles,and the corresponding solu-tions are put forward mainly from two aspects of phase and polarization state,and the verification experiments are completed.Experimental results show that the proposed solutions can achieve the corresponding ideal effect.The beam shaping measures of light source are proposed theoretically to improve the performance of far-field spot distri-bution.Finally,the difference between the atmospheric turbulence at high altitude and that at ground level and the influence of laser transmission angle on laser far-field transmission are analyzed.A number of solutions for the sta-bility of laser far-field atmospheric transmission energy are tried to cover from the practical application aspect,which is used to guide and inspire the research of related technologies in the same field.Specific problems can be proposed according to the principle content.
作者
侯瑞鹏
孟凡斌
杨凯
朱云晨
HOU Ruipeng;MENG Fanbin;YANG Kai;ZHU Yunchen(Academy of Opto-Electronics,China Electronics Technology Group Corporation(AOE CETC),Tianjin,China)
出处
《光电技术应用》
2023年第3期22-29,35,共9页
Electro-Optic Technology Application
关键词
激光远场大气传输能量稳定性
激光远场光斑分布
大气湍流
光强闪烁现象
laser far-field atmospheric transmission energy stability
laser far-field spot distribution
atmospheric turbulence
light intensity scintillation phenomenon
