Wavelength multiplexed Ф-OTDR based on a cross-arranged dual-wavelength UWFBG array

Rui Hong; Yu Yong; Ruifeng Tian; Feng Wang; Yixin Zhang; Xuping Zhang

doi:10.1117/12.3007425

24 November 2023 Wavelength multiplexed Φ-OTDR based on a cross-arranged dual-wavelength UWFBG array

Rui Hong, Yu Yong, Ruifeng Tian, Feng Wang, Yixin Zhang, Xuping Zhang

Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 1293521 (2023) https://doi.org/10.1117/12.3007425
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China

Abstract

Phase sensitive optical time-domain reflectometry (Φ-OTDR) based on ultra-weak fiber Bragg grating (UWFBG) array measures the dynamic strain by extracting the phase of the reflective signals. However, the performance is challenged by the trade-off between spatial resolution and sensing distance. In this paper, we propose a wavelength division multiplexed (WDM) Φ-OTDR based on a cross-arranged dual-wavelength UWFBG array to overcome this limitation. By combining the vibration positioning results of two wavelengths, high resolution and long sensing distance can be achieved at the same time.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Rui Hong, Yu Yong, Ruifeng Tian, Feng Wang, Yixin Zhang, and Xuping Zhang "Wavelength multiplexed Φ-OTDR based on a cross-arranged dual-wavelength UWFBG array", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 1293521 (24 November 2023); https://doi.org/10.1117/12.3007425

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