High-spectra-resolution Mie Doppler lidar based on a two-stage Fabry-Perot etalon for tropospheric wind and aerosol accurate measurement

Shen Fahua; Ji Jie; Xie Chenbo; Wang Zhao; Wang Bangxin

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High-spectra-resolution Mie Doppler lidar based on a two-stage Fabry-Perot etalon for tropospheric wind and aerosol accurate measurement

机译：高光谱分辨率Mie Doppler Lidar基于双级法布里 - 珀罗特龙，用于对流层风和气溶胶精确测量

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A two-stage Fabry-Perot etalon (FPE)-based high-spectral-resolution (HSR) Mie Doppler lidar technology is proposed that is capable of simultaneously detecting tropospheric wind and aerosol optical properties with high precision. The lidar structure is designed, and the measurement principle is analyzed. A two-channel integrated FPE forming a two-stage FPE ensures the relative stability of the spectra. The HSR first-stage etalon can effectively suppress the contamination of Rayleigh signal. The transmission and reflection spectra of the second-stage etalon can form a double edge (DE) to measure wind speed. Two multimode polarization-insensitive optical circulators are used to achieve high-efficiency utilization for backscattering signals. The parameters of the two-stage FPE are optimized. According to the selected system parameters, the detection performance of the proposed lidar is simulated. Simulation results show that with 150 m range resolution and 1 min total accumulation time for the paired line-of-sight (LOS) measurement, within +/- 25 m/s LOS wind speed range, the nighttime and daytime LOS wind speed errors are below 0.48 m/s and 2.5 m/s, respectively, for a clear day, and below 0.58 m/s and 5.5 m/s, respectively, for a hazy day from 0.1 km to 8 km altitude; the backscatter ratio relative errors are below 2.7% up to 8 km for a clear day, and below 4.6% up to 5 km for a hazy day. Compared with the traditional dual-FPE-based DE Mie Doppler lidar, the wind speed accuracies are improved by 2.02-3.58 times for a dear day and 2.14-4.31 times for a hazy day. (C) 2019 Optical Society of America

机译：基于两阶段法布里 - 珀罗标准具（FPE）的高光谱分辨率（HSR）MIE多普勒利达技术，其能够高精度地同时检测对流层风和气溶胶光学性能。设计了LIDAR结构，分析了测量原理。形成两级FPE的双通道集成FPE确保了光谱的相对稳定性。 HSR第一阶段标准具可以有效地抑制瑞利信号的污染。第二阶段标准具的传输和反射光谱可以形成双边缘（DE）以测量风速。两个多模偏振不敏感光学循环器用于实现对反向散射信号的高效利用率。优化了两级FPE的参数。根据所选的系统参数，模拟所提出的LIDAR的检测性能。仿真结果表明，在+/- 25米/秒的洛杉矶风速范围内，带有150米的分辨率和1分钟的视网区测量的总累积时间，夜间和白天LOS风速误差是低于0.48米/秒和2.5米/秒，分别为晴间，分别低于0.58米/秒和5.5米/秒，朦胧的日子从0.1 km到8公里的高度;后散射率相对误差低于2.7％，高达8公里，晴天高达8公里，朦胧的一天可达4.6％至5公里。与传统的双重FPE的DE MIE DOPPPLER LIDAR相比，对于朦胧的一天，风速准确度提高了2.02-3.58倍，2.14-4.31次。（c）2019年光学学会

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《Applied optics》 |2019年第9期|共10页
作者
Shen Fahua; Ji Jie; Xie Chenbo; Wang Zhao; Wang Bangxin;
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作者单位

Yancheng Teachers Univ Dept New Energy &

Elect Engn Yancheng 224007 Jiangsu Peoples R China;

Yancheng Teachers Univ Dept New Energy &

Elect Engn Yancheng 224007 Jiangsu Peoples R China;

Chinese Acad Sci Key Lab Atmospher Opt Anhui Inst Opt &

Fine Mech Hefei 230031 Anhui Peoples R China;

Yancheng Teachers Univ Dept New Energy &

Elect Engn Yancheng 224007 Jiangsu Peoples R China;

Chinese Acad Sci Key Lab Atmospher Opt Anhui Inst Opt &

Fine Mech Hefei 230031 Anhui Peoples R China;

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High-spectra-resolution Mie Doppler lidar based on a two-stage Fabry-Perot etalon for tropospheric wind and aerosol accurate measurement

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