title: Demonstration of an 8-dimensional modulation format with reduced inter-channel nonlinearities in a polarization multiplexed coherent system.
abstract: We demonstrate a polarization-managed 8-dimensional modulation format that is time domain coded to reduce inter-channel nonlinearity. Simulation results show a 2.3 dB improvement in maximum net system margin (NSM) relative to polarization multiplexed (PM)-BPSK, and a 1.0 dB improvement relative to time interleaved return-to-zero (RZ)-PM-BPSK, for five WDM channels propagating over 1600 km ELEAF with 90% inline optical dispersion compensation. In contrast to the other modulations considered, the new 8-dimensional format has negligible sensitivity to the polarization states of the neighboring WDM channels. High-density WDM (HD-WDM) measurements on a 5000 km dispersion-managed link show a 1.0 dB improvement in net system margin relative to PM-BPSK.
authors.forename: A D
authors.initials: AD
authors.lastname: Shiner
authors.forename: M
authors.initials: M
authors.lastname: Reimer
authors.forename: A
authors.initials: A
authors.lastname: Borowiec
authors.forename: S Oveis
authors.initials: SO
authors.lastname: Gharan
authors.forename: J
authors.initials: J
authors.lastname: Gaudette
authors.forename: P
authors.initials: P
authors.lastname: Mehta
authors.forename: D
authors.initials: D
authors.lastname: Charlton
authors.forename: K
authors.initials: K
authors.lastname: Roberts
authors.forename: M
authors.initials: M
authors.lastname: O'Sullivan