Regenerative properties of a pump-modulated four-wave mixing scheme in dispersion-shifted fibers
Regenerative properties of a pump-modulated four-wave mixing scheme in dispersion-shifted fibers
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DOI：
10.1109/jlt.2003.814390
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发表时间：
2003-09
影响因子：
4.7
通讯作者：
A. Bogris;D. Syvridis
中科院分区：
文献类型：
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作者：
A. Bogris;D. Syvridis
提出了一种新的全光信号整形方案。结果表明，适当调节色散位移光纤四波混频波长转换器的工作条件，可以显著提高转换信号的消光比，抑制转换信号的噪声。该方法的关键是将调制比特流应用于输入泵浦波。详细的数值模拟表明，当输入信号的消光比为10.5dB时，可以获得消光比为20dB的波长转换输出，同时Q值的改善几乎为6（从输入端的6.5变为输出端的12以上）。理论预测已被实验证实，通过测量的传递函数的四波混频在17公里长的DSF在不同的操作条件下。所得结果与理论预测值吻合得很好。
A new scheme for all-optical signal reshaping is proposed. It is shown that proper adjustment of the operating conditions of a wavelength converter based on four-wave mixing (FWM) in dispersion-shifted fiber (DSF) results in significant extinction ratio enhancement and noise suppression of the converted signal. The key issue in the proposed idea is the application of the modulation bitstream on the input pump wave. Detailed numerical simulation shows that it is possible to achieve a wavelength-converted output with extinction ratio of 20 dB when the extinction ratio of the input signal is 10.5 dB, while at the same time, the improvement in the Q-factor is almost 6 (from 6.5 at the input, it becomes more than 12 at the output). The theoretical predictions have been experimentally confirmed by measuring the transfer function of the FWM in a 17-km-long DSF under different operating conditions. The obtained results are in a very good agreement with those predicted theoretically.