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用光反馈半导体激光器产生混沌超宽带(UWB)信号,搭建了混沌UWB光载无线通信链路,实现了360,720 Mbit/s和1.44 Gbit/s三种不同传输速率下混沌UWB脉冲信号的生成和传输.在未经任何色散补偿处理的情况下,1.44 Gbit/s的混沌UWB信号在经过10 km单模光纤和0.6 m无线链路传输后,在天线接收端被成功解调.由于混沌UWB信号输出的随机性,对应的UWB信号频谱中未出现任何离散的谱线.这意味着利用混沌UWB信号实现的光载无线通信链路,可以完全避免离散谱线对系统传输性能的劣化.
The chaotic UWB signals are generated by using optical feedback semiconductor lasers, and the chaotic UWB optical wireless communication links are set up to generate and transmit chaotic UWB pulse signals at three different transmission rates of 360, 720 Mbit / s and 1.44 Gbit / s Without any dispersion compensation, the chaotic UWB signal of 1.44 Gbit / s was successfully demodulated at the receiving end of the antenna after transmitting through 10 km single-mode optical fiber and 0.6 m wireless link.As the chaotic UWB signal output , No corresponding discrete spectral line appears in the corresponding UWB signal spectrum, which means that the optical wireless communication link using the chaotic UWB signal can completely avoid the degradation of the system performance due to discrete spectral lines.