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Simulation of a New Method to Generate Gaussian Pulses for UWB Systems | ||
| Journal of University of Babylon | ||
| Article 1, Volume 17, Issue 2, 2009, Pages 800-809 | ||
| Author | ||
| Ibrahim A.Murdas | ||
| Abstract | ||
| Abstract We proposed and demonstrated a novel method to generate Ultra-Wideband (UWB) pulse (monocycle and doublet) using an optically reconfigurable photonic microwave delay-line filter and Optical amplifier (OA) . By using the XGM in the OA, a pair of polarity-reversed optical Gaussian pulses is generated at the output of the OA, to which a Gaussian pulse pump and a continuous-wave probe are applied. The two polarity-reversed optical pulses are then time delayed by two cascaded fiber Bragg gratings to introduce a time delay difference. A UWB monocycle pulse with a full width at half-maximum of 35 ps was achieved. The microwave filter can be reconfigured as a three-tap microwave filter with coefficients of (1, -2, 1). The function of microwave filter is equivalent to an operation of a second-order difference, which can be approximated as a second-order derivative. | ||
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