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基于边缘探测技术的激光雷达系统中,确定分子吸收池滤波器的吸收光谱谱线,以及确定发射激光信号的中心频率,是实现激光雷达系统设计的核心问题。依据不同信道中布里渊散射的特性,仿真出碘分子吸收池在470~550 nm区间的吸收光谱,在此基础上确定激光雷达系统激光中心频率的选取和鉴频器的设计方法。以大气和海水典型信道为例,论证了该方法在基于边缘探测技术的激光雷达中的实际应用。
In the LIDAR system based on the edge detection, determining the absorption spectrum of the molecular absorption cell filter and determining the center frequency of the emitted laser signal are the core issues in designing the LIDAR system. Based on the characteristics of Brillouin scattering in different channels, the absorption spectra of iodine molecular absorption cell in the 470-550 nm range were simulated. Based on this, the selection of laser center frequency and the design of frequency discriminator were confirmed. Taking the typical channels of atmosphere and seawater as an example, the practical application of this method in laser radar based on edge detection technology is demonstrated.