Simulation of chaotic ultra-wideband over fiber link based on optical injection chaotic laser diode

A chaotic ultra-wideband (UWB) over fiber link is proposed and numerically demonstrated. The UWB signals with steerable and flatted power spectrum are generated in the optical domain based on the chaotic dynamics of an optically injected semiconductor laser with optical feedback. The 2.5 Gb/s on-off keying encoded chaotic UWB signals are error-free transmitted through a 25 km signal-mode (SMF) while the signal to noise ratio (SNR) of the wireless channel was fixed on 20 dB. Without utilizing any dispersion compensation module, the RF spectral of the chaotic UWB signals received by antenna fully comply with the spectral mask specified by the U.S. Federal Communications Commission (FCC), and the eye opening penalty (EOP) of the demodulated message are smaller than 3 dB. Moreover, we investigate the dependency of the decoded data EOP on the data bit rate, the fiber transmission distance, and SNR of the wireless channel.