O, S, C, L-Band 4λ 960Gb/s PAM8 Transmission over 6.2km AR-HCF with Linear FFE Only

Anti-resonant hollow-core fiber (AR-HCF) has exhibited the revolutionary potential in wide-spectrum optical transmission. We propose and demonstrate the co-transmission of O, S, C, L-band signals in a single AR-HCF. Enabled by 80Gbaud PAM8 modulated four independent tunable lasers in O, S, C, L-bands and linear equalizers, we achieve the 960Gb/s (240Gb/s/λ × 4 λ) optical interconnect over 6.2km AR-HCF at 20% FEC limit of 2.4 × 10^-2. By adjusting the laser wavelengths, the measured useful bandwidths within the 20% FEC limit are 35nm, 35nm, 30nm and 20nm in O, S, C, L-bands, respectively, which provides an upgrade solution to achieve high-capacity optical interconnects with 200Gb/s/λ and beyond.