介绍了利用边缘技术检测激光频率信号，实现大气激光通讯的原理。描述了利用碘分子滤波器作为边缘滤波器的原理性实验系统，并介绍和分析了实验结果。基于边缘技术的通讯系统拥有很窄的光学带宽和很高的激光频率稳定性，系统的光学信号带宽在400MHz以内，并且接收系统仅对激光信号的频率敏感，可以剔除大气中绝大部分的干扰。对于原理实验的不足之处，文中进行了初步的探讨。

A principle study of detecting laser frequency signals based on edge technology for atmospheric laser communications is presented. An experimental system is built up in which an iodine cell is used as the edge filter. The experimental results were analyzed in detail. Applying edge technology the communication system has two main advantages, the narrow optical bandwidth and the high stability of laser frequency. So an ultra narrow optical filter with bandwidth about 400MHz can be used in the receiver. The receiver is only sensitive to the frequencies of the laser signals. Most of the interference of background light field can be eliminated. Some problems exposed in the experiments are discussed.