Fiber-Wireless-Fiber Link for 128-Gb/s PDM-16QAM Signal Transmission at \(W\) -Band

We propose and experimentally demonstrate a W-band seamlessly integrated fiber-wireless-fiber transmission system enabled by photonic millimeter-wave generation and demodulation techniques, in which up to 128-Gb/s (16-Gbd) polarization division multiplexing 16-ary quadrature amplitude modulation (16QAM) signal can be first transmitted over 50-km single-mode fiber-28 (SMF-28), then delivered over 1-m × 2 multiple-input multiple-output wireless link at 100 GHz and finally transmitted over another 50-km SMF-28 with a bit-error ratio less than the third-generation soft-decision forward-error-correction threshold of 2 × 10
^-2
. The proposed system can be well compatible with high-level QAM and is suited to large-capacity high-spectral-efficiency fiber-wireless integration communication.