为了能够实现对大气中有机气溶胶颗粒的探测，采用激光诱导荧光技术，提出了适用于探测大气有机气溶胶颗粒的荧光激光雷达系统模型。对系统模型及探测原理进行了详细描述，给出了荧光雷达系统参数，并对系统的探测能力进行了模拟。结果表明，该系统在夜间测量时，在5km以下，对有机颗粒的最小可探测浓度可达到几个颗粒／L；对于白天测量，由于太阳背景辐射的影响，在2km以内有较高的灵敏度，最小可探测浓度可达到10个颗粒／L，基本上能够满足实际应用中对有机气溶胶颗粒探测的要求。这对荧光雷达系统的搭建提供了有利的指导。

In order to measure the organic aerosol in the atmosphere,based on laser induced fluorescence,a fluorescence lidar model system was put forward for detecting organic aerosol in the atmosphere. The principle of models system measurement was described exhaustively,system model parameters were presented after fully simulating and analyzing,accounting detection capability. The results showed that when the lidar worked at night,the least detectable density of organic aerosol was only a few particles/L within 5km;while during the daytime,the least detectable density could reduce to less than 10 particles /L within 2km due to background radiation. The results show that the lidar model can satisfy the requirement of real organic aerosol detecting,which could provide valuable instructions to the design of a real system.