Tunable generation of high quality mm- and THz-waves for wireless communications with carrier frequencies up to several THz

Abstract:
Today’s wireless communication systems rely on high quality carrier waves with narrow linewidths and low phase noise in order to handle higher order modulation formats with their high requirements regarding noise. With increasing demand for higher data rates, new frequency regions up to several THz need to be acquired. Here, the tunable optical generation of high quality, stable, ultra-narrow linewidth, and low phase noise carriers at arbitrary frequencies up to 100 GHz is demonstrated, using the polarization pulling assisted Brillouin amplification of two modes of a pulsed modelocked fiber-laser frequency comb. The method is capable for generating frequencies up to several THz and can reach linewidths below 1 Hz with a phase noise in the order of -104 dBc/Hz at an offset of 10 kHz from the carrier.