Open AccessSimultaneous nonlinearity mitigation in 92 × 180-Gbit/s PDM-16QAM transmission over 3840 km using PPLN-based guard-band-less optical phase conjugation
Author(s) -
Takeshi Umeki,
Takushi Kazama,
Akira Sano,
Kohki Shibahara,
Kenya Suzuki,
Matazō Abe,
Hirokazu Takenouchi,
Yutaka Miyamoto
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.016945
Subject(s) - wavelength division multiplexing , optics , channel spacing , quadrature amplitude modulation , bandwidth (computing) , polarization division multiplexing , physics , transmission (telecommunications) , telecommunications , channel (broadcasting) , bit error rate , computer science , wavelength
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 LiNbO 3 waveguides. By employing the CSI-OPC, 2.325-THz-band (93 × 25 GHz) complementary spectral inversion was achieved while retaining the original WDM bandwidth. A Q 2 -factor improvement of over 0.4 dB and a 5120 km transmission with a Q 2 -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.