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Study on characteristics of chirp about Doppler wind lidar system
Du, Li-Fang; Yang, Guo-Tao; Wang, Ji-Hong; Yue, Chuan; Chen, Lin-Xiang
Source PublicationProceedings of SPIE - The International Society for Optical Engineering
AbstractIn 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.
Conference Name3rd 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
Conference DateJuly 22, 2016 - July 26, 2016
Conference PlaceBeijing and Changchun, China
Indexed ByEI
Document Type会议论文
Recommended Citation
GB/T 7714
Du, Li-Fang,Yang, Guo-Tao,Wang, Ji-Hong,et al. Study on characteristics of chirp about Doppler wind lidar system[C]:SPIE,2016.
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