Umeki Takeshi, Kazama Takushi, Sano Akihide, Shibahara Kohki, Suzuki Kenya, Abe Masashi, Takenouchi Hirokazu, Miyamoto Yutaka
Opt Express. 2016 Jul 25;24(15):16945-51. doi: 10.1364/OE.24.016945.
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 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-factor improvement of over 0.4 dB and a 5120 km transmission with a Q-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.
我们通过实验证明了利用互补光谱反转光学相位共轭（CSI-OPC）同时减轻偏振复用16正交幅度调制（PDM-16QAM）波分复用（WDM）信号的非线性。基于周期性极化铌酸锂波导，我们实现了无保留带、无保护带且与偏振无关的光学相位共轭。通过采用CSI-OPC，在保持原始WDM带宽的同时实现了2.325太赫兹频段（93×25吉赫兹）的互补光谱反转。在信号带中心和信号带边缘使用10通道WDM传输，确认了Q因子提高超过0.4分贝以及在Q因子高于前向纠错（FEC）限制的情况下实现了5120千米的传输。然后，我们展示了在3840千米长距离WDM信号传输中减轻所有92通道180吉比特/秒PDM-16QAM准奈奎斯特WDM信号的非线性损伤。
