Dye lasers used in CSSAR sodium fluorescence Doppler lidar

Zhaoai Yan; Xiong Hu; Shangyong Guo; Yongqiang Cheng

doi:10.1117/12.904139

22 August 2011 Dye lasers used in CSSAR sodium fluorescence Doppler lidar

Zhaoai Yan, Xiong Hu, Shangyong Guo, Yongqiang Cheng

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81924O (2011) https://doi.org/10.1117/12.904139
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Mesopause wind and temperature is of great importance for the research on atmospheric dynamics. Center for Space Science and Applied Research, Chinese Academy of Sciences (CSSAR) has developed the first sodium fluorescence Doppler lidar in China to probe the wind and temperature in the mesopause region (about 75-115km). This lidar system employs a narrowband CW dye laser and a pulsed dye amplifier to excite sodium atoms existing in the mesopause region, therefore to induce resonance fluorescence. Atmospheric wind and temperature profiles can be deduced from the backscattered fluorescence collected by lidar receiver. The CW dye laser used in this lidar has narrowband linewidth ~100KHz with the help of some frequency-selective elements. Pound-Drever-Hall technique and Doppler-free saturated spectroscopy technique are applied in this laser to achieve long term laser frequency stabilization. The laser frequency is locked at sodium D2a line with ~± 2MHz precision for hours. In order to obtain enough energy pulsed laser sent to mesopause region, a pulsed dye amplifier has been developed to amplify the CW dye laser's power. It has three amplification stages, output ~1.5W, 30Hz 589nm pulsed laser when the CW laser's power is about 200mW.

Citation Download Citation

Zhaoai Yan, Xiong Hu, Shangyong Guo, and Yongqiang Cheng "Dye lasers used in CSSAR sodium fluorescence Doppler lidar", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81924O (22 August 2011); https://doi.org/10.1117/12.904139

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KEYWORDS

Sodium

LIDAR

Doppler effect

Dye lasers

Luminescence

Laser stabilization

Amplifiers

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