大气激光通信中传输能量损耗分析的应用研究

发布时间：2018-06-10 11:34

本文选题：大气激光通信 + 能量损耗　；参考：《激光与红外》2017年09期

【摘要】：对大气激光通信中的光传输能量损耗进行分析,着重讨论了造成接收端光功率损耗的几个主要影响因素,并做了综合性的计算机仿真,得到发射功率一定的情况下发射天线轴向偏焦和收发天线系统间横向偏移取不同量值时接收端光功率的变化。在损耗分析的基础上,文章探讨了接收端满足最低光功率条件下,偏焦和偏轴相互间的关系,提出通过调节发射天线偏焦来改善远距离接收端天线捕获的方法。在发射功率为10000 m W,距离为10 km,接收端光功率阈值为50 m W的情况下,发射天线未偏焦时收发天线系统间的允许最大偏轴量为495.9mm;当焦点偏移6.69 mm,允许最大偏轴量达到最大值为628.5 mm,与未偏焦的情况相比增加了26.74%,满足接收端光功率要求下收发天线系统间允许横向偏移区域的面积增加了60.63%,这有效地降低了大气激光通信中远距离接收端捕获的难度。
[Abstract]:In this paper, the energy loss of optical transmission in atmospheric laser communication is analyzed, and several main influencing factors of optical power loss at the receiving end are discussed, and the comprehensive computer simulation is done. The change of optical power at the receiving end is obtained when the transmitting antenna is focused in axial direction and the transverse offset between the transmitting and receiving antenna systems is different in the case of a given transmission power. On the basis of loss analysis, this paper discusses the relationship between off-focus and offset axis under the condition that the receiver meets the minimum optical power, and puts forward a method to improve the antenna capture at the remote receiving end by adjusting the focusing of the transmitting antenna. When the transmitting power is 10000 MW, the distance is 10 km, and the optical power threshold at the receiving end is 50 MW, The allowable maximum offset between transmitter and receiver antenna systems is 495.9 mm when the transmit antenna is not focused, and 628.5 mm when the focus deviation is 6.69 mm, which is 26.74 mm more than that in the case of unfocusing, which meets the optical power requirement of the receiving end. The area of the allowable lateral offset area between the lower transceiver antenna systems is increased by 60.63, which effectively reduces the difficulty of capturing the remote receiver in atmospheric laser communication.
【作者单位】：电子科技大学物理电子学院;
【分类号】：TN929.1

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