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Performance Optimization for Phase-Sensitive OTDR Sensing System Based on Multi-Spatial Resolution Analysis.

Yuanyuan Shan1,2, Wenbin Ji3,4, Qing Wang5,6

  • 1The Key Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing 210093, China. dg1523006@smail.nju.edu.cn.

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|December 29, 2018
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Summary
This summary is machine-generated.

This study introduces a phase-sensitive optical time domain reflectometry (Φ-OTDR) system with multi-spatial resolution (MSR) for enhanced vibration sensing. Optimizing spatial resolution (SR) improves signal-to-noise ratio (SNR), enabling better detection of diverse vibration events.

Keywords:
multi-spatial resolution (MSR) analysisphase-sensitive optical time domain reflectometry (Φ-OTDR)signal-to-noise ratio (SNR)

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Area of Science:

  • Photonics and Optical Sensing
  • Fiber Optic Sensing Technology
  • Signal Processing in Communications

Background:

  • Phase-sensitive optical time domain reflectometry (Φ-OTDR) is crucial for distributed fiber optic sensing.
  • Existing Φ-OTDR systems face challenges in optimizing spatial resolution (SR) and signal-to-noise ratio (SNR) for diverse vibration events.
  • The trade-off between SR and SNR limits the effectiveness of single-resolution sensing systems.

Purpose of the Study:

  • To propose and demonstrate a novel Φ-OTDR sensing system with multi-spatial resolution (MSR) analysis.
  • To investigate the relationship between SR, SNR, and vibration region length.
  • To enhance the performance of Φ-OTDR systems by optimizing SNR for various disturbance ranges.

Main Methods:

  • Theoretical analysis of the interplay between SR, SNR, and vibration event characteristics.
  • Experimental validation of the proposed MSR sensing scheme.
  • Development of an MSR analysis property for Φ-OTDR systems.

Main Results:

  • A qualitative relationship between SR, SNR, and vibration region length was established.
  • Choosing an appropriate SR was shown to effectively enhance the SNR of the sensing system.
  • The MSR sensing scheme successfully restored vibration events of different disturbance ranges with optimized SNR.

Conclusions:

  • The proposed MSR sensing scheme significantly improves Φ-OTDR performance.
  • MSR analysis allows for effective SNR enhancement by selecting optimal SR for specific vibration events.
  • This approach offers a versatile solution for optimizing distributed fiber optic sensing systems.