首页|Ultrasonic phase extraction method for co-cable identification in coherent optical transmission systems

Ultrasonic phase extraction method for co-cable identification in coherent optical transmission systems

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An ultrasonic phase extraction method is proposed for co-cable identification without modifying transceivers in coherent optical transmission systems.To extract the ultrasonic phase,we apply an improved residual frequency offset compen-sation algorithm,an optimized unwrapping algorithm for mitigating phase noise induced by phase ambiguity between digital signal processing[DSP]blocks,and an averaging operation for improving the phase sensitivity.In a 64-GBaud dual-polarization quadrature phase shift keying[DP-QPSK]simulation system,the phase sensitivity of the proposed method reaches 0.03 rad using lasers with 100-kHz linewidth and a 60-kHz ultrasonic source,with only 400 k-points[kpts]stored data.Also verified by an experiment under the same transmission conditions,the sensitivity reaches 0.39 rad,with 3 kpts of data stored and no averaging due to the equipment limitation.The results have shown this method provides a better choice for low-cost and real-time co-cable identification in integrated sensing and communication optical networks.

co-cable identificationoptical fiber sensingintegrated sensing and communication

周昊、左文、乔耀军、赵岩、叶兵、白成林、许恒迎

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State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications,Beijing 100876,China

State Key Laboratory of Mobile Network and Mobile Multimedia Technology,WDM System Department,ZTE Corporation,Beijing 100020,China

School of Physics Science and Information Engineering,Liaocheng University,Liaocheng 252000,China

2024

10.3788/COL202422.100601

中国光学快报(英文版)
中国光学学会 中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD
影响因子：1.305
ISSN：1671-7694
年,卷(期)：2024.22(10)