Analysis of the Status Quo,Development Trend and Key Technologies of Space Laser Communication

The status quo of research and experiments home and abroad in the field of space laser communication between platforms including satellites,aircraft,ground and submarines are introduced to meet the demand for space laser communication. We summarize five trends of the development of space laser communication,i.e.high speed,networking,multi-purpose,integration and multi-spectrum,based on the analysis of the status quo of space laser communication and research and development practices.From the perspectives of optical structure,communication transceivers and environmental impact of space laser communication systems,we analyze eight main key technologies,i.e.the design of high-quality optical systems,high-accuracy acquisition and alignment tracking,compensation for impact of atmospheric channels,high rate and high power transmission,high sensitivity and low BER(Bit Error Rate)detection,point-to-multi-point communication network,compensation for platform vibration and attitude,and space qualification of devices and components.Meanwhile,the solutions and approaches are given for the key technologies.The areas for further research are also proposed for good prospect of application of space laser communication.