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DOE OSTI · 2477359

Phase-Sensitive Optical Time Domain Reflectometry With Rayleigh Enhanced Optical Fiber

Lalam, Nageswara·Westbrook, Paul S.·Li, Jie·Lu, Ping·Buric, Michael P.
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Abstract

In this paper, a phase-sensitive optical time domain reflectometry (Φ-OTDR) based on Rayleigh enhanced optical fiber is proposed to improve the system signal-to-noise ratio (SNR). In the experiment, the vibration performance of the Rayleigh enhanced optical fiber is analyzed and compared with standard single-mode telecom fiber. The results demonstrate that the measured SNRs of peaks in frequency spectra have been improved by 14 dB (at 1 kHz vibration frequency) at the end of the 2 km specialty sensing fiber. A wide range of vibration frequencies from 50 Hz to 15 kHz are demonstrated experimentally. The proposed method overcomes the inherent limitations of the conventional Φ-OTDR system and significantly enhances the vibration sensing performance.

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47 OTHER INSTRUMENTATIONRayleigh enhanced optical fiberoptical fiber sensorsvibration sensing

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Lalam, Nageswara, Westbrook, Paul S., Li, Jie, Lu, Ping, Buric, Michael P.. 2021-08-16. Phase-Sensitive Optical Time Domain Reflectometry With Rayleigh Enhanced Optical Fiber. https://doi.org/10.1109/access.2021.3105334

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