Free Space Optical Communication Networking Technology Based on a Laser Relay Station

Optical communication modulation technology and networking are two important technologies for constructing free-space optical (FSO) communication. In this paper, pulse width (PWM) is used to realize The process of signal demodulation implemented by means a field programmable gate array (FPGA). An relay system constructed networking. binary data bits in the converted into signals different widths, realized sampling with high-speed analog-to-digital converter (ADC), level determined counting proportion high low voltages sampled period. analyzes routing target after receiving from transmitter, then sends receiver. experimental results show that can achieve point-to-multipoint Additionally, using ADC demodulate received increases stability system. This provides design prototype FSO technology.