Research On Experiment System Of Video Wireless Laser Communication

With the development and popularization of digital signal, development of related products also become popular researching direction, It will must replace the original analog signals. However, in the wireless laser communication prototype, still using old-fashioned analog signal transmission, in order to make up for the blank, let the wireless laser communication experiment keep up with the pace of times, this paper designed a set of the experimental prototype used for transiting digital video signal.This system was designed using the1550nm DFB-LD as light source of system,and InGaAs-APD as Photo Detector. Because of using digital signal to transmit,so choose Huffman coding,digital modulation are used QAM and OFDM to make a combination of technology.this paper also designed the digital modulation circuit of transmitter and the amplification circuit of receiver. Finally,summarized the experimental system performance and the experimental results and put forward the improvement plan.