Photonics-Aided 32-Gb/s Wireless Signal Transmission Over 1 km at K-Band

We experimentally demonstrate a K-band (18-27 GHz) fiber-wireless-integration transmission system, which, compared with that at high-frequency W-band (75-110 GHz), can provide large-capacity long-haul wireless transmission with relatively low cost and simple architecture. In our demonstrated system, the generated up to 4-Gbaud (32-Gb/s) polarization-division-multiplexing 16-ary quadrature-amplitude-modulation (PDM-16QAM) radio frequency (RF) signal at 23 GHz can be delivered over 100-km single-mode fiber-28 and >1-km wireless distance with a bit error ratio less than the hard-decision forward-error-correction threshold of 3.8 × 10
^-3
. To the best of our knowledge, this is the first time to realize over 1-km wireless delivery for up to 32-Gb/s RF signal at K-band.