title: Generation of 1.024-Tb/s Nyquist-WDM phase-conjugated twin vector waves by a polarization-insensitive optical parametric amplifier for fiber-nonlinearity-tolerant transmission.
abstract: We experimentally demonstrate the generation of 1.024-Tb/s Nyquist-WDM phase-conjugated vector twin waves (PCTWs), consisting of eight 128-Gb/s polarization-division-multiplexed QPSK signals and their idlers, by a broadband polarization-insensitive fiber optic parametric amplifier. This novel all-optical signal processing approach to generate WDM-PCTWs enables a 2-fold reduction in the needed optical transmitters as compared to the conventional approach where each idler is generated by a dedicated transmitter. Digital coherent superposition of the twin waves at the receiver enables more than doubled reach in a dispersion-managed transmission link. We further study the impact of polarization-mode dispersion on the performance gain brought by the phase-conjugated twin waves, showing a gain of ~3.8 dB in signal quality factors.
authors.forename: Xiang
authors.initials: X
authors.lastname: Liu
authors.forename: Hao
authors.initials: H
authors.lastname: Hu
authors.forename: S
authors.initials: S
authors.lastname: Chandrasekhar
authors.forename: R M
authors.initials: RM
authors.lastname: Jopson
authors.forename: A H
authors.initials: AH
authors.lastname: Gnauck
authors.forename: M
authors.initials: M
authors.lastname: Dinu
authors.forename: C
authors.initials: C
authors.lastname: Xie
authors.forename: P J
authors.initials: PJ
authors.lastname: Winzer