基于光子晶体光纤中的自相位调制的全光再生

利用高非线性光子晶体光纤中的自相位调制效应产生的超连续谱,理论上推导了超窄脉冲信号的再生机制。分别从频域和时域上形象的解释了脉冲再生的原理,该本再生方法可以适用于OTDM的信号再生。实验上对劣化了的脉冲宽度为1.7ps的携带信息的超窄脉冲信号进行了再生,再生之后的信号峰值均衡,消光比达到了15dB。再生前信号中心波长是1548.2nm,重复频率是9.96872GHz。实验中,在1554nm—1570nm和1530nm—1543nm范围内都可以得到10dB以上的再生质量。同时拟合了信号峰值功率和波长关系,得到的曲线和超连续谱曲线相吻合。

All optical regeneration based on self-phase-modulation in PCF

A theoretical analysis is given about the 2R regeneration scheme of peco-second pulse based on the super continuum spectrum (SCS) in high non-linear photonic crystal fiber (HNL-PCF).The mechanism of peco-second pulse regeneration is demonstrated from the time domain and frequency domain.This regeneration mechanism can be used in OTDM system.Optical pulse carrying information "1100 1100" whose pulse-width is 1.7 ps is regenerated experimentally.The regenerated signal is peak value balanced and its extinction ratio is 15dB.The center wavelength of the signal is 1548.2nm.The frequency of the signal is 9.96872GHz.The extinction ratio of regenerated signal exceeds 10dB in the range of 1554nm to 1570nm and 1530nm to 1543nm.The relation curve between the peak power and wavelength coincides to the SCS curve in HNL-PCF.