A scheme for all-fiber clock enhancement of non-return-to-zero (NRZ) data based on cross-phase modulation (XPM) effect in nonlinear fibers is proposed and demonstrated in simulation. The simulation results indicate that the clock-to-data ratio of NRZ signals at 64 Gb/s can be increased to 22.94 dB by using this scheme, and the pattern effect in clock enhanced signals is very weak. The ability of high speed operation up to 140 Gb/s of this scheme is also proved in our simulation.
© 2005 Chinese Optics Letters
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(060.5060) Fiber optics and optical communications : Phase modulation
(060.7140) Fiber optics and optical communications : Ultrafast processes in fibers
(070.4560) Fourier optics and signal processing : Data processing by optical means
Tong Wu and Kun Qiu, "High speed fiber-based clock enhancement of NRZ data," Chin. Opt. Lett. 3, 193-195 (2005)