Widely-Tunable and Background-Free Ultra-Wideband Signals Generation Utilizing Polarization Modulation-Based Optical Switch

Photonic millimeter-wave-band ultra-wideband signal generation based on a dual-drive Mach-Zehnder modulator

“…To overcome the drawback, several schemes have been proposed to generate background-free MMW-UWB signals. An UWB signal without low frequency components and a residual local oscillator was generated by using a polarization modulation based high-speed microwave photonic switch [11,12]. To simplify the signal generation system and improve the stability, a background-free MMW-UWB signal generation scheme using a DP-MZM was proposed, in which a 25 GHz MMW-UWB signal was generated [13].…”

Photonic Generation of Ultrawideband Signals With Large Carrier Frequency Tunability Based on an Optical Carrier Phase-Shifting Method

“…To overcome the short propagation range of the UWB signals, which is generally limited by the extremely low power density, UWB-over-fiber systems have been proposed to increase the transmission range [2], [3]. Therefore, it is highly desirable to directly generate UWB signals in the optical domain [4]- [18]. We focus on the generation of UWB signals using photonic method in this work.…”

“…Several methods have been reported to suppress the strong residual LO signal and the baseband frequency components [14]- [18]. In [14], the strong residual LO signal was suppressed using an intensity modulation scheme with high extinction ratio.…”

“…Other techniques reported in [16]- [18] can suppress the strong residual LO signal and the baseband frequency components at the same time by means of optical frequency shift keying modulation [16] or optical switch [17], [18]. In [17] and [18], the UWB signals are generated by switching the optical signals between two states, one of which has only a pure optical carrier. The other state consists of both the optical carrier and the modulation sideband.…”

Photonic generation of background-free millimeter-wave ultra-wideband signals (Invited Paper)

“…The Federal Communications Commission (FCC) defined the UWB signal as a radio frequency (RF) signal that occupies a spectral bandwidth of more than 500 MHz or more than 20% fractional bandwidth with a power density no more than −41.3 dBm∕MHz [2] . Up to now, various approaches have been proposed to generate UWB signals in the centimeter-wave (CMW) band (3.1 to 10.6 GHz) for indoor communications [3][4][5][6][7] and in the millimeter-wave (MMW) band (22 to 29 GHz) for outdoor communications [8][9][10][11][12][13][14][15][16][17][18][19] . In this Review, we review recent progress on the photonic generation of UWB signals in the MMW band with emphasis on the generation of background-free and FCC compliant MMW-UWB pulses.…”