| 入射光斑对双F-P标准具测风激光雷达的影响 |
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| 引用本文： | 夏海云,孙东松,董晶晶,沈法华.入射光斑对双F-P标准具测风激光雷达的影响[J].红外与激光工程,2007,36(3):377-381. |
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| 作者姓名： | 夏海云 孙东松 董晶晶 沈法华 |
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| 作者单位： | 1. 北京航空航天大学,仪器科学与光电工程学院,北京,100083
2. 中国科学院安徽光学精密机械研究所,安徽,合肥,230031 |
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| 摘 要： | 在直接测风激光雷达的接收光路中安装CCD监视器，发现了入射到标准具上光斑的形状及其强度分布对标准具透过率曲线产生的影响。理论分析表明：入射光斑影响了双Fabry-Perot标准具的频谱间距和透过率曲线的形状，双边缘直接测风激光雷达由此将引入较大的系统误差。另外，由于强度分布的随机性，使系统的校准常数失去实际意义。通过在传导光纤上安装扰模器，并在反演风速时引入强度分布函数，可以减小光斑引起的误差。理论和实验表明，文中方法对直接探测测风激光雷达的精度有直接影响。
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| 关 键 词： | 激光雷达 风 直接探测 光斑 |
| 文章编号： | 1007-2276（2007）03-0377-05 |
| 收稿时间： | 2006/8/20 |
| 修稿时间： | 2006-08-202006-10-12 |
Illumination effects on the dual Fabry-Perot etalon based Doppler wind lidar |
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| XIA Hai-yun,SUN Dong-song,DONG Jing-jing,SHEN Fa-hua.Illumination effects on the dual Fabry-Perot etalon based Doppler wind lidar[J].Infrared and Laser Engineering,2007,36(3):377-381. |
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| Authors: | XIA Hai-yun SUN Dong-song DONG Jing-jing SHEN Fa-hua |
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| Affiliation: | 1.School of Instrument Science & Opto-Electronics Engineering, Beihang University, Beijing 100083,China; 2.Institute of Anhui Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031,China |
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| Abstract: | An updated prototype wind lidar system is discussed. A CCD camera is mounted behind the Fabry-Perot interferometer in the receiver of the direct-detection Doppler lidar. It is found that the shape of the illumination pattern and intensity distribution on the interferometer affect obviously its transmission curves. These phenomena result in a large system error in the inversion of wind velocity. However, by setting a mode scrambler on the transfer fiber and introducing intensity distribution function in the data processing, these effects can be reduced. Theoretical analysis and experiments are performed. All results show that the method proposed has a substantial effect on the system accuracy. |
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| Keywords: | Lidar Wind Direct detection Illumination |
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