Frequency drift noise suppression in φ-OFDR based on optical phase-locked loop

Qiang Yang; Weilin Xie; Weilin Xie; Jiang Yang; Congfan Wang; Xiang Zheng; Yi Dong; Yi Dong

doi:10.1364/OFS.2023.F1.2

28th International Conference on Optical Fiber Sensors
Technical Digest Series (Optica Publishing Group, 2023),
paper F1.2
•https://doi.org/10.1364/OFS.2023.F1.2

Frequency drift noise suppression in φ-OFDR based on optical phase-locked loop

Qiang Yang, Weilin Xie, Jiang Yang, Congfan Wang, Xiang Zheng, and Yi Dong

Optical Fiber Sensors 2023

Naka-ku, Hamamatsu-shi Japan
20–24 November 2023
ISBN: 978-1-957171-30-2

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Distributed Sensors III (F1)

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Q. Yang, W. Xie, J. Yang, C. Wang, X. Zheng, and Y. Dong, "Frequency drift noise suppression in φ-OFDR based on optical phase-locked loop," in 28th International Conference on Optical Fiber Sensors, Technical Digest Series (Optica Publishing Group, 2023), paper F1.2.

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Abstract

A φ-OFDR system based on optical phase-locked loop is proposed to suppress laser frequency drift noise. The results demonstrate a significant improvement of 16.1 dB in the signal-to-noise ratio (SNR) of the demodulated strain signal at 0.1 Hz compared with open-loop state.

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