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Beneficial use of spectral broadening resulting from the nonlinearity of the fiber-optic channel

机译:有益地使用由光纤通道的非线性引起的光谱展宽

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摘要

We discuss the possibility of exploiting spectral broadening resulting from fiber nonlinearity for the transmission of information. The spectral broadening induced by nonlinearity combined with the appropriate waveform can turn quadrature amplitude modulation-like constellations into frequency-shift-keying constellations over a much larger dimension. Thus, the Kerr effect can be thought of as a large dimensional mapper/modulator. A simple single-span fiber-optic link implemented over dispersion shifted fiber is assumed for the demonstration of the principle. It is shown that for a particular constellation the achievable data rates in the presence of nonlinearity can be significantly higher than the capacity characterizing a linear channel with the same input bandwidth.
机译:我们讨论了利用光纤非线性导致的光谱展宽来传输信息的可能性。由非线性引起的频谱展宽与适当的波形相结合,可以在更大的维度上将类似正交调幅的星座转变为频移键控星座。因此,可将克尔效应看作是大型的映射器/调制器。为了说明该原理,假设在色散位移光纤上实现了一个简单的单跨光纤链路。结果表明,对于特定的星座图,在存在非线性的情况下可达到的数据速率可能明显高于表征具有相同输入带宽的线性信道的容量。

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