title: 2 × 64 Gb/s PAM-4 transmission over 70 km SSMF using O-band 18G-class directly modulated lasers (DMLs).
abstract: We experimentally demonstrate 2 × 64 Gb/s PAM-4 transmission over a 70 km standard single-mode fiber (SSMF) using two O-band 18G-class directly modulated lasers (DMLs). Only one praseodymium-doped fiber amplifier (PDFA) at the receiver side is used to compensate the transmission loss. Meanwhile, transmission impairments are compensated by a sparse Volterra filter (SVF) equalizer, which can achieve similar system performance but with half the computational complexity (CC), in comparison with a traditional VF equalizer. Finally, we optimize the insignificant factor (IF) of SVF to identify the trade-off between the transmission performance and the CC. Thus, the redundancy of individual SVF kernels can be reasonably removed.
authors.forename: Fan
authors.initials: F
authors.lastname: Gao
authors.forename: Shiwei
authors.initials: S
authors.lastname: Zhou
authors.forename: Xiang
authors.initials: X
authors.lastname: Li
authors.forename: Songnian
authors.initials: S
authors.lastname: Fu
authors.forename: Lei
authors.initials: L
authors.lastname: Deng
authors.forename: Ming
authors.initials: M
authors.lastname: Tang
authors.forename: Deming
authors.initials: D
authors.lastname: Liu
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang