title: Simultaneous nonlinearity mitigation in 92 × 180-Gbit/s PDM-16QAM transmission over 3840 km using PPLN-based guard-band-less optical phase conjugation.
abstract: We experimentally demonstrated the simultaneous nonlinearity mitigation of PDM-16QAM WDM signals using complementary-spectrally-inverted optical phase conjugation (CSI-OPC). We achieved reserved-band-less, guard-band-less, and polarization independent OPC based on periodically poled LiNbO3waveguides. By employing the CSI-OPC, 2.325-THz-band (93 × 25 GHz) complementary spectral inversion was achieved while retaining the original WDM bandwidth. A Q2-factor improvement of over 0.4 dB and a 5120 km transmission with a Q2-factor above the FEC limit were confirmed using a 10-channel WDM transmission at the signal band center and signal band edge. We then demonstrated the mitigation of the nonlinear impairments in a 3840 km long-haul WDM signal transmission for all 92-channel 180-Gbit/s PDM-16QAM quasi-Nyquist-WDM signals.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Umeki
authors.forename: Takushi
authors.initials: T
authors.lastname: Kazama
authors.forename: Akihide
authors.initials: A
authors.lastname: Sano
authors.forename: Kohki
authors.initials: K
authors.lastname: Shibahara
authors.forename: Kenya
authors.initials: K
authors.lastname: Suzuki
authors.forename: Masashi
authors.initials: M
authors.lastname: Abe
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Takenouchi
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Miyamoto