SiBEAM Technologies, Sunnyvale, California 94085, USA.
Opt Lett. 2011 Feb 15;36(4):585-7. doi: 10.1364/OL.36.000585.
In electronic digital signal processing based optical communication systems, digital equalization for chromatic dispersion interacts with local oscillator phase noise to produce equalization-enhanced phase noise (EEPN). In addition to both phase and intensity noises, EEPN also induces timing jitter to the equalized signal. For a 100 Gbit/s quadrature-phase-shift keying signal with laser linewidth of 300 kHz, the timing jitter is up to 20% of the symbol interval for a transmission distance of 1500 km.
在基于电子数字信号处理的光通信系统中，用于色度色散的数字均衡会与本振相位噪声相互作用，从而产生均衡增强相位噪声（EEPN）。EEPN 不仅会引入相位噪声和强度噪声，还会使均衡后的信号产生定时抖动。对于激光线宽为 300 kHz 的 100 Gbit/s 正交相移键控信号，在传输距离为 1500 km 的情况下，定时抖动可达符号间隔的 20%。
