Integrated Communication and Enhanced Forward Phase-Based Sensing Based on Frequency-Domain Pilot Tones in DSCM Systems Using 100 kHz ECLs

被引：1

作者：

Yang, Bang ^{[1
]}

Tang, Jianwei ^{[2
]}

Cheng, Chen ^{[1
]}

Fan, Linsheng ^{[2
]}

Yang, Pengxi ^{[1
]}

Wang, Shangyi ^{[1
]}

Zhao, Tianfeng ^{[2
]}

Liang, Junpeng ^{[2
]}

Gao, Shuang ^{[1
]}

Wei, Jinlong ^{[2
]}

Yao, Yong ^{[1
]}

Yang, Yanfu ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Integrated Circuits, Shenzhen 518055, Peoples R China

[2] Peng Cheng Lab, Shenzhen 518000, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2025年 / 43卷 / 06期

关键词：

Sensors; Vibrations; Optical fiber communication; Optical fiber polarization; Optical fiber networks; Optical fiber cables; Laser noise; Accuracy; Phase noise; Maintenance; Co-cable identification; integrated sensing and communication; network operation and maintenance; optical fiber communication;

D O I：

10.1109/JLT.2024.3510371

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, integrated scheme of enhanced vibration-sensing and digital subcarrier multiplexing (DSCM) communication based on frequency-domain pilot tones (FPTs) is proposed and demonstrated experimentally. In the scheme, FPTs are employed for multiple receiver digital signal processing (DSP) modules including frequency offset estimation (FOE), carrier phase estimation (CPE) and polarization demultiplexing. Meanwhile, with the recovered phase after CPE, the vibration-induced phase is extracted for sensing with band-pass filter within a frequency range of 7 kHz to 50 kHz. Thanks to two FPTs, dynamic FOE performance is enhanced under the frequency drift of 100 kHz ECLs compared to the conventional FOE methods, such as Max-Fast Fourier Transform (Max-FFT) and Viterbi-Viterbi (VV) algorithm. This enhancement can effectively suppress the background noise of the recovered phase after CPE, which inherently can subsequently improve the vibration sensing ability at a low frequency. In the experiment, sensing signal-to-noise ratio (SSNR) at 10 kHz is improved by 10 dB with the aid of FPTs. As a result, the vibration of frequency down to 10 kHz is successfully detected based on forward phase-based sensing in integrated DSCM communication system using commercial 100 kHz ECLs. The proposed integrated solution is compatible with the existing optical networks employing commercial ECLs to support intelligent operation and maintenance.

引用

页码：2664 / 2671

页数：8