National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan.
Opt Lett. 2013 Sep 1;38(17):3287-90. doi: 10.1364/OL.38.003287.
We demonstrate a seamless spectral defragmentation in an elastic all-optical add-drop node based on wavelength division multiplexing (WDM) channels of Nyquist optical time division multiplexing (OTDM) signal. A 172 Gbaud Nyquist OTDM signal occupying a 215 GHz range is elastically shifted adjacent to its neighboring channel, completely filling a variable spectral gap caused by the dropped channel. The frequency shift is done in a dual-stage polarization-diversity four wave mixing-based converter using polarization-maintaining highly nonlinear fiber. The spectrally defragmented signals are successfully transmitted over a 80 km fiber link with BER<10(-9).
我们在基于波分复用（WDM）通道的弹性全光上下节点中演示了无缝谱碎片消除，该节点基于奈奎斯特光时分复用（OTDM）信号。一个占据 215GHz 范围的 172Gbaud 奈奎斯特 OTDM 信号被弹性地移到相邻信道旁边，完全填充了由于丢弃信道而产生的可变光谱间隙。频率转换是在使用保偏高非线性光纤的两级偏振分集四波混频转换器中完成的。经过 80km 光纤链路传输后，频谱碎片消除信号的误码率（BER）<10(-9)。
