Research of all-optical broadcast UWB pulse shape modulation signals based on semiconductor fiber ring laser

A novel scheme for all-optical generate ultra-wideband (UWB) pulse shape modulation (PSM) signals based on semiconductor fiber ring laser (SFRL) is proposed, in which three UWB PSM signals can be generated simultaneously. A comprehensive broad-band dynamic model of this kind of all-optical UWB PSM signals is presented and simulated. The numerical simulation results show that the central frequency (CF) of PSM signals, the -10dB bandwidth of PSM signals and the fractional bandwidth of PSM signals are 5GHz, 7GHz and 140%, respectively, which satisfy the definition of the UWB.