激光雷达风速模拟系统设计

The design of wind velocity simulation system for Lidar

摘要:

多普勒测风激光雷达是大气风场探测的重要手段。本文以光纤Mach-Zehnder干涉仪作为测风激光雷达系统的鉴频器,设计并建立了风速模拟探测激光雷达的自校正式实验系统,采用可控转速机械转轮产生的线速度引起激光多普勒频移的方法模拟大气风场。其主要由激光发射系统、模拟风场系统和光电探测系统组成。初步利用种子激光器的可调节波长实现了系统输出强度变化,通过能量探测方式验证了光纤Mach-Zehnder干涉仪透过率谱强度曲线,实验分析结果验证了鉴频系统的可靠性,并进一步实现了鉴频系统光程差精确校正。

Abstract:

Doppler lidar is an important means of atmospheric wind field detection, In this paper, based on fiber optic Mach Zehnder interferometer as lidar system frequency discriminator, complete simulation of lidar wind speed from the school formal experiment system design, adjustable speed turntable uses as a simulation wind velocity generating means and completed the experimental system set up. Initial utilization the seed laser wavelength can be adjusted to achieve the system output intensity variation, experimental analysis of results show that the frequency discriminator system reliability and further realize the optical path difference discriminator system accurate correction.