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

IEEE Access

卷:9

Michael P. Buric¹  Nageswara Lalam²  Ping Lu²  Jie Li³  Paul S. Westbrook⁴ 

[1] National Energy Technology Laboratory, Morgantown, WV, USA;

[2] National Energy Technology Laboratory, Pittsburgh, PA, USA;

[3] OFS Fitel, LLC, Avon, CT, USA;

[4] OFS Laboratories, Somerset, NJ, USA;

关键词: Optical fiber sensors;    Rayleigh enhanced optical fiber;    vibration sensing;   

DOI  :  10.1109/ACCESS.2021.3105334

来源: DOAJ

【 摘 要 】

In this paper, a phase-sensitive optical time domain reflectometry ( $\Phi $ -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 $\Phi $ -OTDR system and significantly enhances the vibration sensing performance.

【 授权许可】

Unknown