Experimental estimation of inter-channel nonlinearity power by using differential pilot

被引：1
|
作者：
Zhou, Jingru [1 ]
Yang, Aiying [2 ]
Guo, Peng [2 ]
Zhuang, Lingwei [1 ]
Guo, Shaojian [1 ]
Qiao, Yaojun [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Informat & Commun Engn, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
[2] Beijing Inst Technol, Sch Opt & Photon, Minist Ind & Informat Technol, Key Lab Photon Informat Technol, Beijing 100081, Peoples R China
来源：
OPTICAL FIBER TECHNOLOGY | 2020年 / 58卷
基金：
中国国家自然科学基金;
关键词：
Coherent optical communication; Inter-channel nonlinearity (NL); Differential pilot (DP); NOISE; COMMUNICATION; COMPENSATION; DISPERSION; EQUALIZER; OSNR;
D O I：
10.1016/j.yofte.2020.102256
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we present the first experimental demonstration of inter-channel nonlinearity (NL) estimation with differential pilot (DP). This method has a simplified encoding structure of transmitter and low complexity. The distribution of different components in the received signal spectrum can be differentiated with Fast Fourier Transform (FFT), and the inter-channel NL power can be obtained by power subtraction. To verify the practicability of this method, a 25-GBaud coherent quadrature-phase-shift-keying (QPSK) wavelength division multiplexing (WDM) experiment system is employed with the launch power of 0-10 dBm per channel over 900-km standard single-mode fiber (SSMF). The results demonstrate that the inter-channel NL power estimation error is less than 1.5 dB when launch power is larger than 4 dBm per channel. Therefore, this method has good practicability for the inter-channel NL power estimation of coherent WDM systems.
引用
收藏
页数：6
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