In order to achieve a separate test of laser communication systems,various loads and bit error rate test need to be simulated.Light,embedded,intelligent and high-speed simulation data sources are essential.A FPGA-based intelligent simulation data sources were developed,it made multi-channel videos and audio signals to composite into one high-speed data streams,which simulated a variety of payloads(SAR,visible,infrared),and the speed of communication signal is 1.08 Gbps.And the pseudo-random sequence can be achieved,transmission speed is 3Gbps,which is used for the bit error rate test.High-speed pseudo-random sequence is adjustable in the rate-smart,rate range is from 750 Mbps to 3 Gbps.The type of data transmission can be selected,such as video and audio serial data stream,pseudo-random sequences and simulation the data source.