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题名: Study on characteristics of chirp about Doppler wind lidar system
作者: Du, Li-Fang; Yang, Guo-Tao; Wang, Ji-Hong; Yue, Chuan; Chen, Lin-Xiang
作者部门: 空间科学部
会议名称: 3rd International Symposium on Monitoring, Early Warning, Removal Technology of Space Targets and Debris, the 4th International Conference on Frontiers in Optical Imaging Technology and Applications, and the 2nd International Symposium on Photoelectric Defense Technologies
会议日期: July 22, 2016 - July 26, 2016
会议地点: Beijing and Changchun, China
会议录: Proceedings of SPIE - The International Society for Optical Engineering
会议录出版者: SPIE
出版日期: 2016
收录类别: EI
ISSN号: 0277786X
ISBN号: 9781510607279
英文摘要: In the doppler wind lidar, usually every 4MHz frequency error will produce wind error of 1m/s of 532nm laser. In the Doppler lidar system, frequency stabilization was achieved through absorption of iodine molecules. Commands that control the instrumental system were based on the PID algorithm and coded using VB language. The frequency of the seed laser was locked to iodine molecular absorption line 1109 which is close to the upper edge of the absorption range, with long-time (>4h) frequency-locking accuracy being≤0.5MHz and long-time frequency stability being 10-9. The experimental result indicated that the seed frequency and the pulse laser frequency have a deviation, which effect is called the laser chirp characteristics. Finally chirp test system was constructed and tested the frequency offset in time. And such frequency deviation is known as Chirp of the laser pulse. The real-time measured frequency difference of the continuous and pulsed lights was about 10MHz, long-time stability deviation was around 5MHz. After experimental testing technology mature, which can monitoring the signal at long-term with corrected the wind speed. © 2016 SPIE.
语种: 英语
内容类型: 会议论文
URI标识: http://ir.nssc.ac.cn/handle/122/5699
Appears in Collections:空间科学部_会议论文

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