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混沌超宽带信号的光学产生及其链路传输
？hotonic generation and transmission of chaotic ultra wideband signals
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摘要: 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360，720Mbit／s和1．44Gbit／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，1．44Gbit／s的混沌UWB信号在经过10km单模光纤和0．6m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．Abstract: We propose and experimentally demonstrate a chaotic ultra wideband （UWB） over fiber link based on optical feedback laser diode, in which UWB signals are generated and transmitted at three different bit rates of 360, 720 Mbit/s, and 1.44 Gbit/s respectively. Without utilizing any dispersion compensation module, the signal at a bit rate of 1.44 Gbit/s is detected using a digital signal processing receiver after 10 km fiber and 0.6 m wireless channel transmission. The power spectrum does not have any discrete spectral line because of the random output of the chaotic pulses, which means that the harmful effects of discrete spectral lines could be avoided with this method.
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