Fabry–Perot etalon-based ultraviolet high-spectral-resolution lidar for tropospheric temperature and aerosol measurement
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The 355-nm ultraviolet high-spectral-resolution technique based on a triple Fabry–Perot etalon (FPE) for simultaneous high-accuracy measurement of tropospheric temperature and aerosol is proposed. The detection principle is analyzed and the whole structure of lidar system is designed. The parameters of the triple FPE-labeled FPE-1, FPE-2 and FPE-L are optimized in detail. FPE-1, FPE-2 and FPE-L are used for measuring aerosol and separating Rayleigh signal from Mie signal, for measuring temperature and for frequency locking, respectively. The performance simulation of the proposed lidar system showed that the measurement errors of temperature and backscatter ratio are below 2 K and 0.17% at 8 km and below 4 K and 0.39% at 12 km with 30-m range resolution and 1-min integration time using a 48 mJ pulse energy and 20 Hz repetition rate laser and a 25-cm telescope. The influence of Mie signal contamination on temperature measurement mainly depends on the relative Mie rejection factors of the two channels for temperature measurement, which are 4.2 and 10.4% of our proposed system at 270 K and the corresponding temperature deviation is 1 K with backscatter ratio of 10 and Rayleigh photoelectrons of 105. Assuming the same number of total photoelectrons received, the backscatter ratio and temperature measurement accuracies of our proposed lidar are 4.16–22.58 and 2.07–2.76 times, respectively, that of the traditional dual-pass multi-cavity-FPE-based HSRL at temperature of 220–290 K and backscatter ratio of 1–10.
This work was supported by the Natural Science Foundation of Jiangsu Province, China (BK20161316), the Open Research Fund of Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences (2017), the Young Scientists Fund of the National Natural Science Foundation of China (51504214).
- 4.N. Sugimoto, I. Matsui, Z. Liu, A. Shimizu, I. Tamamushi, K. Asai, Observation of aerosols and clouds using a two-wavelength polarization lidar during the Nauru99 experiment. Sea Sky 76, 93–98 (2000)Google Scholar
- 5.G. Bo, D. Liu, B. Wang, D. Wu, Z. Zhong, Two-wavelength polarization airborne lidar for observation of aerosol and cloud. Chin. J. Lasers 39, 203–208 (2012)Google Scholar
- 14.L. Bu, J. Guo, L. Tian, X. Huang, B. Liu, Y. Feng, Rayleigh-Raman lidar used for atmospheric temperature profile measurement. High Power Laser Part. Beams 7, 1449–1452 (2010)Google Scholar
- 27.R.J. Alvarez, Measurement of tropospheric temperature and aerosol extinction using high spectral resolution lidar. Ph.D. Thesis Colorado State Univ., Fort Collins, (1991)Google Scholar
- 33.S. Wang, J. Su, P. Zhao, K. Cao, S. Hu, H. Wei, K. Tan, H. Hu, A pure rotational Raman-lidar based on three-stage Fabry–Perot etalons for monitoring atmospheric temperature. Acta Phys. Sin. 57, 3941–3946 (2008)Google Scholar
- 36.F. Shen, Y. Xia, A. Yu, C. Liu, Transmission spectral characteristics of F–P interferometer under multi-factors. Infrared Laser Eng 6, 1800–1805 (2015)Google Scholar
- 39.X. Xu, N. Weng, L. Xiao, G. Sun, Detecting the vertical velocity in the atmosphere boundary layer in Hefei using Sodar. J. Atmos. Environ. Opt. 5, 101–104 (2006)Google Scholar
- 41.R.A. McClatchey, A.P. D’Agati, Atmospheric transmission of laser radiation. AFGL Report, No. TR-78-0029, USA (1978) p. 24Google Scholar