Chinese Journal of Quantum Electronics, Volume. 33, Issue 2, 243(2016)
Research on all fiber CW laser Doppler wind velocimetry
In the system of the aviation sensor, entrance of pitot tube used for speed measuerment is easily blocked and causes an accident. Currently the wind lidar is the unique solution to be a substitute for pitot tube. The common pulsed wind lidar cannot work in the near field due to blind spot at close range. In order to solve this problem, a monostatic coherent 1.55 μm continuous-wave (CW) laser Doppler wind velocimetry with an output power of 1 W was presented, in which a fiber-optics polarization-maintaining circulator, coupler and a balanced detector was used. A standarized experiment was carried out using a rotating platform, 5 m away from the telescope of the velocimetry. Results show that a velocity accuracy of 0.021 m/s and an excellent degree of speed correlation (R2=0.99) form a linear regression analysis of the system versus true rotating target. It was also showed that the speed of air away from telescope 25 m was implemented with the velocimetry.
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CHEN Zhen, XIN Fengxin, WANG Junyang, LI Hui, MA Ling, LIU Zhishen, ZHU Jinshan. Research on all fiber CW laser Doppler wind velocimetry[J]. Chinese Journal of Quantum Electronics, 2016, 33(2): 243
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Received: Mar. 20, 2015
Accepted: --
Published Online: Mar. 29, 2016
The Author Email: Zhen CHEN (wlcz890222@126.com)