Adaptive optimization for pilot-tone aided phase noise compensation

作者：Cui Sheng; Xu Mengran; Xia Wenjuan; Ke Chanjian^*; Xia Zijie; Liu Deming

来源：Optics Communications, 2015, 355: 44-49.

DOI：10.1016/j.optcom.2015.06.030

• Coherent transmission system
• Pilot tone
• Phase noise compensation
• Laser phase noise
• Cross phase modulation
• Digital signal processing

Pilot-tone (PT) aided phase noise compensation algorithm is very simple and effective, especially for flexible optical networks, because the phase noise coming from both Tx/Rx lasers and nonlinear cross phase modulation (XPM) during transmission can be adaptively compensated without high computational cost nonlinear operations, or the information of the neighboring channels and the optical link configuration. But to achieve the best performance the two key parameters, i.e. the pilot to signal power ratio and pilot bandpass filter bandwidth need to be optimized. In this paper it is demonstrated that constellation information can be used to adjust the two parameters adaptively to achieve the minimum BER in both homogenous and hybrid single carrier transmission systems with different LPN, XPM and amplified spontaneous emission (ASE) noise distortions.

• 出版日期2015-11-15
• 单位华中科技大学