[ThC1] Nonlinearity and Its Mitigation

[ThC1-2] Nonlinearity Mitigation of PDM-16QAM Signal Using Multiple CSI-OPCs in Ultra-long Haul Transmission without Excess Penalty

〇Takeshi Umeki¹, Takayuki Kobayashi¹, Akihide Sano^1,2, Takuya Ikuta¹, Masashi Abe^1,3, Takushi Kazama¹, Koji Enbutsu¹, Ryoichi Kasahara¹, Yutaka Miyamoto¹ (¹NTT Corporation, Japan, ²Ritsumeikan Univ., Japan, ³Chuo Univ., Japan)

キーワード：Optical signal processing techniques for optical communications, Transmission impairments and their mitigations

We demonstrate transmission reach enhancement by nonlinearity mitigation in a Raman-amplifier-based transmission link by utilizing a CSI-OPC device multiple times, which causes less Q-factor degradation in a linear regime, using 22.5-Gbaud PDM-16QAM 10-channel DWDM signals.