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首页> 外文期刊>Selected Topics in Quantum Electronics, IEEE Journal of >Coherent All-Optical Phase and Amplitude Regenerator of Binary Phase-Encoded Signals
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Coherent All-Optical Phase and Amplitude Regenerator of Binary Phase-Encoded Signals

机译：二进制相位编码信号的相干全光相位和幅度再生器

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摘要

The performance of future ultralong-haul communication systems exploiting phase-encoded signals is likely to be compromised by nonlinear phase noise generated during signal transmission. One potential way to mitigate against nonlinear phase noise is to use phase-sensitive amplifiers (PSAs) that have been demonstrated to help remove such phase noise as well as to provide simultaneous signal amplitude noise suppression when operated in saturation. Recently, we have shown that a PSA-based signal regenerator based on degenerate four-wave mixing could be implemented in a network-compatible manner in which only the (noisy) signal is present at the device input (black-box operation). However, this scheme was tested only with relatively high-frequency deterministic perturbations applied to the signal. Here, we address both theoretically and experimentally the important issue of how such a regenerator works with more realistic random broadband amplitude/phase noise distributions. Good regenerative performance is demonstrated and our study also illustrates an additional unique feature of PSA-based regenerators-namely error correction for differentially encoded signals when placed in front of a DPSK receiver. Furthermore, we present a simplified regenerator implementation providing highly stable operation and representing a significant further step toward a practical device.
机译：未来利用相位编码信号的超远程通信系统的性能可能会受到信号传输过程中产生的非线性相位噪声的影响。减轻非线性相位噪声的一种潜在方法是使用相敏放大器（PSA），该器件已被证明可帮助消除此类相位噪声并在饱和状态下提供同时的信号幅度噪声抑制。最近，我们已经表明，可以基于网络兼容的方式实现基于简并四波混频的基于PSA的信号再生器，其中在设备输入端仅出现（噪声）信号（黑盒操作）。但是，仅在对信号施加了相对较高的频率确定性扰动的情况下对该方案进行了测试。在这里，我们在理论上和实验上都解决了这样一个再生器如何在更现实的随机宽带幅度/相位噪声分布下工作的重要问题。演示了良好的再生性能，并且我们的研究还说明了基于PSA的再生器的另一个独特功能，即将差分编码信号置于DPSK接收器之前时的纠错功能。此外，我们提出了一种简化的再生器实施方案，该方案可提供高度稳定的运行，并朝着实用设备迈出了重要的一步。

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