近距离激光通信链路能量分析与试验

针对收发口径固有位置偏差对城市近距离激光通信系统的影响进行了分析,建立了链路能量与固有位置误差模型,计算了不同误差下的链路能量情况,并分析了二者关系。以固有位置误差15 mm为例,计算了不同距离下的链路能量,在基础上,进行了实际的通信验证试验,给出具体试验操作流程,并得到了距离10~40 m的实测数据。实验数据表明,与理论偏差不超过0.52 dB,验证了理论能量模型的正确性。该能量模型可用于指导近距离通信端机的设计和链路搭建,同时,小型化光端机的成功研制及通信试验可有效加速城市间近距离下的民用通信领域应用。

The link energy analysis and test of close-range laser communication

For the closed distance communication among urban buildings,the influence of inherent position error between the receiving aperture and the transmitting aperture is analyzed.The new model of link energy with inherent position error is established.The link energy data are calculated under different inherent position error,and the relationship between the link energy and the inherent position error is analyzed.Taking the inherent position error of 15mm as an example,the link energy under different distances is calculated.On the basis,the actual communication verification test is conducted,the specific test operation process is given and the measured data with the distance of 10m,40m and 1000m are obtained.Comparing with the theory data,the experimental data shows that the maximum error is less than 0.52dB.The correctness of the theoretical energy model is verified.The energy model can be used to guide the design of remote distance communication terminal.At the same time,the successfully development and communication test can effectively accelerate the application of civil communication for urban buildings.