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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Multimode all-fiber quasi-distributed refractometer sensor array and cross-talk mitigation.

Marko Kezmah1, Denis Donlagić

  • 1University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia.

Applied Optics
|June 16, 2007
PubMed
Summary

This study presents a quasi-distributed multimode fiber refractometer array. Mode conditioning effectively mitigated cross-talk, enabling practical sensor network design with minimal signal loss.

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Area of Science:

  • Optoelectronics
  • Fiber Optics Sensing
  • Photonics

Background:

  • Quasi-distributed sensor arrays face challenges with cross-talk between sensors.
  • Multimode fiber refractometers exhibit mode filtering and excitation-dependent properties, exacerbating cross-talk.
  • Effective mitigation strategies are crucial for practical sensor network deployment.

Purpose of the Study:

  • To analyze and design a quasi-distributed multimode fiber refractometer array.
  • To address and mitigate pronounced cross-talk effects among individual sensors.
  • To provide experimental data for effective network design.

Main Methods:

  • Introduction of mode conditioning using fiber mode filters and mode mixers.
  • Experimental analysis of multimode sensor array behavior.
  • Quantification of cross-talk reduction and collateral losses.

Main Results:

  • Cross-talk effects were reduced to a negligible level through mode conditioning.
  • Desired sensor response was maintained with acceptable collateral losses.
  • Detailed experimental data on array behavior was obtained.

Conclusions:

  • Mode conditioning is an effective strategy for mitigating cross-talk in multimode fiber refractometer arrays.
  • The developed array design is practical for quasi-distributed sensing applications.
  • Experimental validation supports the proposed design for robust sensor networks.