title: High-order statistical equalizer for nonlinearity compensation in dispersion-managed coherent optical communications.
abstract: Fiber nonlinearity has become a major limiting factor to realize ultra-high-speed optical communications. We propose a fractionally-spaced equalizer which exploits a trained high-order statistics to deal with data-pattern dependent nonlinear impairments in fiber-optic communications. The computer simulation reveals that the proposed 3-tap equalizer improves Q-factor by more than 2 dB for long-haul transmissions of 5,230 km distance and 40 Gbps data rate. We also demonstrate that the joint use of a digital backpropagation (DBP) and the proposed equalizer offers an additional 1-2 dB performance improvement due to the channel shortening gain. A performance in high-speed transmissions of 100 Gbps and beyond is evaluated as well.
authors: MERL, 201 Broadway, Cambridge, Massachusetts 02139, USA. koike@merl.com
authors: Toshiaki
authors: T
authors: Koike-Akino
authors: Chunjie
authors: C
authors: Duan
authors: Kieran
authors: K
authors: Parsons
authors: Keisuke
authors: K
authors: Kojima
authors: Tsuyoshi
authors: T
authors: Yoshida
authors: Takashi
authors: T
authors: Sugihara
authors: Takashi
authors: T
authors: Mizuochi