Matsumoto Masayuki
Opt Express. 2006 Feb 20;14(4):1430-8. doi: 10.1364/oe.14.001430.
Simultaneous reshaping of optically time-division-multiplexed RZ-OOK and RZ-DPSK signals by a fiber-based regenerator is numerically demonstrated. The regenerator utilizes the four-wave mixing (FWM) in a highly nonlinear fiber. A parametric amplifier configuration without wavelength conversion of the signal is assumed, in which ultra-fast saturation of the FWM interaction gives stabilization of signal amplitude with the signal phase principally maintained. The regenerator greatly improves the performance of OOK tributaries. Although the regenerator does not have the function of phase regeneration, it improves the DPSK signal quality when the signal power is relatively low where the amplitude noise is significant. Influence of the pump phase modulation on the regenerator performance is also examined.
通过数值模拟证明了基于光纤的再生器对光时分复用的归零开关键控（RZ-OOK）和归零差分相移键控（RZ-DPSK）信号的同时整形。该再生器利用高非线性光纤中的四波混频（FWM）。假设采用一种信号无波长转换的参量放大器配置，其中FWM相互作用的超快饱和实现了信号幅度的稳定，且信号相位基本保持不变。该再生器极大地提高了开关键控支路的性能。尽管该再生器不具备相位再生功能，但在信号功率相对较低且幅度噪声显著的情况下，它能改善差分相移键控信号的质量。文中还研究了泵浦相位调制对再生器性能的影响。
