High-throughput full-duplex DWDM IM-DD mobile fronthaul based on anti-resonant hollow-core fiber

In this Letter, we experimentally demonstrate a 16.7 Tb/s co-frequency co-time full-duplex 10 km mobile fronthaul on C band by harnessing the ultralow loss, nonlinearity, dispersion, and Rayleigh backscattering of anti-resonant hollow-core fiber. 112 GBaud four-level pulse amplitude modulation signals are adopted with direct detection. Bit error rates of all the channels are below 6.7% hard-decision forward error correction threshold of 3.8 × 10^-3. Few sensitivity penalties of inter-channel nonlinear interference and backward crosstalk are observed as 0.2 dB and 0.5 dB, respectively. This work shows that anti-resonant hollow-core fiber is a promising medium for implementing a high-capacity 6 G fronthaul architecture.