All-optical four-wavelength 2R regeneration based on data-pump four-wave-mixing with offset filtering

作者：Wen, Feng; Wu, Bao-Jian^*; Zhou, Xing-Yu; Yuan, Hao; Qiu, Kun

来源：Optical Fiber Technology, 2014, 20(3): 274-279.

DOI：10.1016/j.yofte.2014.02.012

• All-optical multi-wavelength regeneration
• Highly nonlinear fiber
• Nonlinear optical signal processing

A simultaneous all-optical 2R regeneration of 4 x 12.5 Gb/s return-to-zero (RZ) signals is demonstrated based on the data-pump four-wave-mixing in a single highly nonlinear fiber, in which the channel spacing and duty cycle are 200 GHz and 50%. Both the bidirectional configuration and time-interleaved technology are used to reduce the crosstalk from other channels. For further improving the performance of the multichannel regenerator, an offset filtering (OF) method is employed to minimize the influence from the opposite input signal. Our experiments show that the extinction ratio (ER) of regenerated signals is about two times larger than that of the degraded signals and the maximum ER improvement is about 6.5 dB. By using the offset filtering method, the sensitivity improvements of four-wavelength regenerated signals are 2.05 dB, 2.53 dB, 3.57 dB and 2.8 dB, respectively.

• 出版日期2014-6
• 单位电子科技大学