空间激光通信及其关键技术

通信领域中激光通信技术由于自身的优越性得到了广泛的应用。通过将空间激光通信与微波通信比较，介绍空间激光通信的优点：大容量、低功耗及体积小、质量轻等。叙述空间激光通信的基本原理。重点阐述空间激光通信系统大功率光源技术、高灵敏度抗干扰光信号接收技术、通信链路的快速及精确的捕获、跟踪和瞄准技术等关键技术。激光通信可广泛应用于军事、经济等各个领域，必将有广阔的发展前景。

Free-space laser communication and its key technology

By Comparison with microwave communication, the advantages of the free-space laser communication system, such as big capacity, low power consumption, small volume and light weight, are introduced. The basic principle of the space laser communication is described. The key technologies in high-power light source, antijamming high sensitivity optical signal receiving, fast and precision capture, tracking and aiming of communication link in the space laser communication system, are put forward emphatically. The free-space laser communicationcan find wide applications in military and commercial fields and it has a great potential.