利用Fabry-Perot标准具的米散射测风激光雷达接收机

Mie wind lidar receiver based on Fabry-Perot etalon

介绍了基于米散射多普勒测风激光雷达的基本原理。测风激光雷达系统一般由发射系统、接收系统、信号发射接收光学系统、控制系统组成,其中接收系统在整个系统中最重要,起到信号鉴频的作用。基于测量误差最小和实际加工工艺的考虑,设计了标准具的参数和米散射测风激光雷达接收机的结构,并且把该接收机用于米散射测风激光雷达系统中并进行了标准具透过率的测量,用Pseudo-Voigt函数拟合出标准具的各个参数,与理论设计相差在5%以内。同时进行了风廓线的初步测量,与风廓线雷达Airda16000进行了比对,两者符合很好。

The principle of Doppler wind lidar based on Mie backscattering was introduced.The wind lidar was composed of transmitting system,receiving system,transceiving system and controlling system.The most important of these systems is receiving system which was usd for a frequency discriminator.The parameters of Fabry-perot etalon were designed while the wind measure′s error was least and the mechanical technics can be realized.The structure of Mie Doppler wind lidar receiver was designed.The transmittance of etalon was measured and the parameters of etalon were fitted by Pseudo-Voigt function.The difference between the measured etalon′s parameters and designed parameters was lower than 5%.This receiver be used for the wind lidar system and the horizon wind velocity and direction were obtained.The result of wind profile measured by the system is in accordance with the wind profile measured by Airda16000 approximately.