Crosstalk-power in homogenous single-mode multi-core fibers can vary by more than 20 dB over time and frequency. The extend of these fluctuations depends on the interacting cores’ propagation parameters and the transmitted modulation format. Furthermore, the polarizations of signal and crosstalk can change randomly during transmission. In this paper, we describe the effect of random crosstalk-power variations and the relative signal-crosstalk polarization fluctuations when transmitting single-polarization, intensity-modulated signals such as on-off-keying. We show experimentally that the polarization of a signal fluctuates slower than the polarization of crosstalk, indicating uncorrelated processes. We further investigate the system impact of both, crosstalk-power fluctuations and the relative signal-crosstalk polarization variations on a 10 Gb/s on-off-keying transmission system employing a 10.1 km 19-core multi-core fiber. We show that the two-dimensional space of random fluctuations that is spanned by crosstalk power and relative signal-crosstalk polarization can vary the system's bit error rate by more than five orders of magnitude.

中文翻译：

---

强度调制直接检测多芯光纤传输中串扰引起的系统中断

同质单模多芯光纤中的串扰功率可随时间和频率变化超过 20 dB。这些波动的范围取决于交互核心的传播参数和传输的调制格式。此外，信号和串扰的极化可以在传输过程中随机变化。在本文中，我们描述了在传输单偏振、强度调制信号（例如开关键控）时随机串扰功率变化和相对信号串扰偏振波动的影响。我们通过实验表明，信号的极化波动比串扰的极化慢，表明过程不相关。我们进一步调查了两者的系统影响，采用 10.1 km 19 芯多芯光纤的 10 Gb/s 开关键控传输系统上的串扰功率波动和相对信号串扰偏振变化。我们表明，由串扰功率和相对信号串扰极化跨越的随机波动的二维空间可以使系统的误码率变化超过五个数量级。