Abstract
A photonic approach to generate millimeter-wave (MMW) ultra-wideband (UWB) monocycle and doublet signals using stimulated Brillouin scattering (SBS) selective sideband amplification technique and delay-line filter is proposed and theoretically analyzed. In the proposed approach, a dual-drive Mach–Zehnder modulator (DDMZM) is used as a first-order differentiator to produce a monocycle UWB signal. Then the generated monocycle signal is single-sideband (SSB) modulated by SBS effect for up-conversion. A balanced photodetector (BPD) is further employed for both photodetection and first-order differentiation. Consequently, an MMW-UWB monocycle signal or an MMW-UWB doublet signal can be attained in electrical field with controlling an optical switch. The frequency spectra of the generated MMW-UWB monocycle and doublet signals meet well with the Federal Communication Committee (FCC) mask with power efficiency of 50.63% and 40.53%. Besides, the produced MMW-UWB signals can be employed to realize multiple modulation formats, such as on–off keying modulation (OOK), pulse position modulation (PPM) and pulse amplitude modulation (PAM).
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