Ninghua Zhu

TL;DR: In this paper, a simple widely tunable and background-free ultra wideband (UWB) pulse shaper by utilizing the polarization modulation-based optical switch is proposed and demonstrated by virtue of the excellent switch isolation and the complementarity between two inverted baseband signals output from the optical switch, the local oscillator leakage signal and the low frequency components of the obtained UWB signals are suppressed very well.

TL;DR: In this paper, a photonic approach was proposed to generate ultrawideband (UWB) pulses with large carrier frequency tunability based on an optical carrier phase-shifting technique by cascading polarization modulators (PolMs) and a polarizer.

TL;DR: In this paper, a simple photonic method was proposed to generate square and triangular microwave waveforms without any optical signal processing which is the key advantage of our method compared with previous works. But the proposed signal generator only consists of a sinusoidal radio-frequency (RF) source, a conventional Mach-Zehnder modulator, and a photodetector (PD).

TL;DR: Continuously tuneable single frequency oscillation and stable multimode oscillation are produced by the new optoelectronic parametric oscillator, which are hard or even impossible to achieve in traditional delay-controlled oscillators.

TL;DR: In this article, a photonic approach to generate the ultrawideband (UWB) pulses with tunable band-rejection behavior based on a negative coefficient two-tap microwave photonic filter is proposed and experimentally demonstrated.