| 多纵模激光F-P标准具双边缘测风可行性分析 |
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| 引用本文： | 刘星,巩马理.多纵模激光F-P标准具双边缘测风可行性分析[J].光学技术,2008,34(1):48-51. |
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| 作者姓名： | 刘星 巩马理 |
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| 作者单位： | 清华大学,精密仪器与机械学系,北京,100084 |
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| 摘 要： | 讨论采用多纵模激光器作探测光源用于双边缘多普勒激光雷达测风的可行性。给出了多纵模激光器谐振腔腔长与边缘滤波器F-P标准具腔长之间的关系。分析了多纵模双边缘测风的主要特性,计算灵敏度、信噪比和径向测速误差,并与单纵模测风性能进行对比。可用类似单纵模测风中动态频率跟踪技术解决多纵模激光器频率漂移问题。
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| 关 键 词： | 激光技术 多普勒测风激光雷达 边缘技术 多纵模激光器 Fabry-Perot标准具 |
| 文章编号： | 1002-1582(2008)01-0048-04 |
| 修稿时间： | 2007年4月29日 |
Performance validation for wind measurement with multi-longitudinal mode double-edge detection |
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| LIU Xing,GONG Ma-li.Performance validation for wind measurement with multi-longitudinal mode double-edge detection[J].Optical Technique,2008,34(1):48-51. |
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| Authors: | LIU Xing GONG Ma-li |
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| Abstract: | Feasibility is discussed that a multi-longitudinal mode laser is employed as the detection light source of the double-edge technique for Doppler lidar wind measurement.The connection between resonator length of a multi-longitudinal mode laser and cavity length of a F-P etalon used as the edge filter is put forward.Main characteristics of double-edge wind measurement with a multi-longitudinal mode laser are analyzed.Sensitivity,signal-to-noise ratio and error in the line-of-sight(LOS) velocity of edge detection wind measurement using a multi-longitudinal mode laser are calculated and compared with those of using a single-mode laser.What's more,frequency drift of a multi-longitudinal mode laser can be solved by a technology similar to dynamic frequency tracking used in single-mode wind measurement. |
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| Keywords: | laser technique Doppler wind lidar edge technique multi-longitudinal mode laser Fabry-Perot etalon |
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