Design of ultra-narrow filter for Rayleigh Doppler lidar

Li Zimu; Chen Tingdi; Liu Hengjia; Sun Dongsong; Wang Guocheng; Tang Lei

doi:10.3788/IRLA201847.1030003

The mobile lidar of USTC implements the continuous wind measurement in 15-60 km neutral atmosphere at night. Since the signal to noise radio was limited by background light during daytime operation, an ultra-narrow filter which combined an interference filter with a solid FP etalon was designed to reduce the background noise. An approach to solve the optimum parameters for the F-P etalon was proposed, based on the Frequency Discriminator, an etalon filter with bandwidth of 8.4 pm, center wavelength of 354.73 nm, free spectral range of 150 pm and peak transmission of 0.67 was achieved to decrease the background noise to one in eighteen. The improvement of SNR and velocity errors were simulated. The effect of temperature and tilting angle on bandwidth, center wavelength and transmissivity was calculated. A method of tuning by tilting angle was designed. The experiment result is highly uniform with the theoretical value.

Design of ultra-narrow filter for Rayleigh Doppler lidar

1. School of Earth and Space Science,University of Science and Technology of China,Hefei 230026,China;

2. New Star Institute of Applied Technology,PLA,Hefei 230031,China;

3. School of Electronic Information and Electrical Engineering,Hefei Normal University,Hefei 230601,China

Received Date: 2018-05-11

Rev Recd Date: 2018-06-03

Publish Date: 2018-10-25

Key words:

Abstract: The mobile lidar of USTC implements the continuous wind measurement in 15-60 km neutral atmosphere at night. Since the signal to noise radio was limited by background light during daytime operation, an ultra-narrow filter which combined an interference filter with a solid FP etalon was designed to reduce the background noise. An approach to solve the optimum parameters for the F-P etalon was proposed, based on the Frequency Discriminator, an etalon filter with bandwidth of 8.4 pm, center wavelength of 354.73 nm, free spectral range of 150 pm and peak transmission of 0.67 was achieved to decrease the background noise to one in eighteen. The improvement of SNR and velocity errors were simulated. The effect of temperature and tilting angle on bandwidth, center wavelength and transmissivity was calculated. A method of tuning by tilting angle was designed. The experiment result is highly uniform with the theoretical value.

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Reference (13)

[1]	Popescu Alexandru, Walther T. On the potential of faraday anomalous dispersion optical filters as high-resolution edge filters[J]. Laser Physics, 2005, 15(1):55-60.
[2]	Kiefer W, Low R, Wrachtrup J, et al. Na-faraday rotation filtering:The optimal point[J]. Sci Rep, 2014, 4(6552):10.1038/srep06552.
[3]	Rees D, Vyssogorets M, Meredith N P, et al. The doppler wind and temperature system of the alomar lidar facility:Overview and initial results[J]. Journal of Atmospheric and Terrestrial Physics, 1996, 58(16):1827-1842.
[4]	Zaun N H, Weimer C, Sidorin Y, et al. Solid-etalon for the calipso lidar receiver[C]//Earth Observing Systems IX, 2004, 5542:141-145.
[5]	Zheng Jun, Sun Dongsong, Dou Xiankang, et al. 60 km Rayleigh Doppler lidar and wind measurement[J]. Infrared and Laser Engineering, 2016, 45(10):1030002. (in Chinese)郑俊, 孙东松, 窦贤康, 等. 60 km瑞利多普勒激光雷达及其风场探测[J]. 红外与激光工程, 2016, 45(10):1030002.
[6]	Han Yan, Sun Dongsong, Weng Ningquan, et al. Development of 60 km mobile Rayleigh wind lidar[J]. Infrared and Laser Engineering, 2015, 44(5):1414-1419. (in Chinese)韩燕, 孙东松, 翁宁泉, 等. 60 km车载瑞利测风激光雷达研制[J]. 红外与激光工程, 2015, 44(5):1414-1419.
[7]	Dou X K, Han Y L, Sun D S, et al. Mobile Rayleigh Doppler lidar for wind and temperature measurements in the stratosphere and lower mesosphere[J]. Optics Express, 2014, 22(17):A1203-A1221.
[8]	Atherton P D, Reay N K, Ring J. Tunable Fabry-Perot filters[J]. Optical Engineering, 1981, 20(6):806-814.
[9]	Sun Jian, Feng Yutao, Bai Qinglan, et al. Design of thermal stable Fabry-Perot etalon for wind mearsuremnt[J]. Optics and Precision Engineering, 2013, 21(5):1167-1173. (in Chinese)孙剑, 冯玉涛, 白清兰, 等. 高热稳定性测风Fabry-Perot干涉仪标准具的设计[J]. 光学精密工程, 2013, 21(5):1167-1173.
[10]	Tai Hongda, Zhuang Zibo, Jiang Lihui, et al. Multi-point mobile measurement of atmospheric transmittance[J]. Optics and Precision Engineering, 2016, 24(8):1894-1901. (in Chinese)台宏达, 庄子波, 蒋立辉, 等. 大气透过率的多点移动测量[J]. 光学精密工程, 2016, 24(8):1894-1901.
[11]	Liu Huasong, Wang Lishuan, Ji Yiqin, et al. Study on the influence factors of the characteristic of laser etalon with solid dielectric spacer-layer[J]. Chinese Optics, 2015, 8(1):74-83. (in Chinese)刘华松, 王利栓, 季一勤, 等. 固体介质间隔层激光标准具性能的影响因素研究[J]. 中国光学, 2015, 8(1):74-83.
[12]	Li Li, Wang Canzhao, Xie Yafeng, et al. Wind field inversion technique for scanning wind lidar[J]. Chinese Optics, 2013, 6(2):251-258. (in Chinese)李丽, 王灿召, 谢亚峰,等. 扫描式测风激光雷达的风场反演[J]. 中国光学, 2013, 6(2):251-258.
[13]	Macleod H A. Thin-film Optical Filters[M]. US:McGraw-Hill, 1989.

Design of ultra-narrow filter for Rayleigh Doppler lidar

doi: 10.3788/IRLA201847.1030003

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