Abstract The frequency spectrum is becoming busier, thereby it might be appealing for more and more, for instance, eavesdroppers to try to gather some valuable data or identify the transmission frequencies for this specific data. To mitigate the possible risks concerning that, not only data encryption but also hiding of the data channels (creation of stealth channels) is necessary. For the success of stealth signal integration, channel spacing, and power customization is required. During this research, in the simulation environment, we show a successful realization of the 8-channel 10 Gbit/s non-return-to-zero on–off keying (NRZ-OOK) modulated wavelength-division-multiplexed passive optical network (WDM-PON) with the embedded additional amplified spontaneous emission (ASE) powered hidden 7-channel 2.5 Gbit/s NRZ-OOK modulated spectrum-sliced data transmission system. Such as a hybrid optical transmission system can be used to improve the protection of sensitive data. Our results show that the introduction of the stealth data transmission system leads to an estimated power penalty below 0.02 dB at the pre-FEC BER level of 10−3, which may be considered as negligible and shows the viability of this hybrid system. The proposed approach can be applied not only in the WDM-PON architecture but also in other types of fiber optical access or metro-access systems.

中文翻译：

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用于隐写术应用的嵌入式ASE驱动隐身通道混合WDM-PON数据传输系统研究

摘要 频谱变得越来越繁忙，因此可能会吸引越来越多的人，例如，窃听者试图收集一些有价值的数据或识别这些特定数据的传输频率。为了降低可能的风险，不仅需要加密数据，还需要隐藏数据通道（创建隐形通道）。隐身信号集成的成功需要通道间隔和功率定制。在本研究中，在仿真环境中，我们展示了 8 通道 10 Gbit/s 不归零开关键控 (NRZ-OOK) 调制波分复用无源光网络 (WDM) 的成功实现-PON) 与嵌入式附加放大自发辐射 (ASE) 供电隐藏 7 通道 2。5 Gbit/s NRZ-OOK 调制频谱切片数据传输系统。例如混合光传输系统可用于提高对敏感数据的保护。我们的结果表明，隐身数据传输系统的引入导致在 10-3 的前 FEC BER 水平下估计功率损失低于 0.02 dB，这可以被认为是可以忽略不计的，并显示了该混合系统的可行性。所提出的方法不仅可以应用于 WDM-PON 架构，还可以应用于其他类型的光纤接入或城域接入系统。这可以被认为是微不足道的，并显示了这种混合系统的可行性。所提出的方法不仅可以应用于 WDM-PON 架构，还可以应用于其他类型的光纤接入或城域接入系统。这可以被认为是微不足道的，并显示了这种混合系统的可行性。所提出的方法不仅可以应用于 WDM-PON 架构，还可以应用于其他类型的光纤接入或城域接入系统。