A Flexible and Lightweight Laser Wireless Access Network Design for Space Vehicle

A laser wireless access network system design for space vehicle is presented. The system has the properties of flexibility, lightweight, reliability, interference free and secrecy, which can meet the requirement of communication system for space vehicle. The adaptability of the system to the environment of space, electrical system compatibility, the technology advantage, network topology, modulator and coding mode and choice of the wavelength of the laser is introduced in detail. In order to focus on the key technologies involved in deep, a specific solution is put forward and verified by the demonstration system. In this system, the wavelength of the laser is 850 nm. And, the bandwidth enhancement beyond 100 Mbps - enabled by the laser wireless access network - provides for a smoothly operating network that can evolve. A five network nodes networks are available in the demonstration system, and the node number can be extended by cascading style easily. The network latency is within 3 ms, communication distance is over 15 m, and the error rate is below 10-7. Moreover, the compatibility testing between the wireless laser devices and the existing electrical system of space vehicle is done. The experimental results indicate that the wireless laser system can be developed in the electrical system of space vehicle in the future.