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Newest Methods and Approaches to Enhance the Performance of Optical Frequency-Domain Reflectometers.

Ivan A Lobach1, Andrei A Fotiadi2,3, Vasily A Yatseev4

  • 1Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia.

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Summary

This review covers advances in optical frequency-domain reflectometers (OFDRs) and fiber optic sensors, detailing improvements in measurement accuracy and new sensing capabilities through integrated reflectometry methods.

Keywords:
OFDRalgorithmsauxiliary interferometerbackscatteringcross-correlationdemodulationdistributed fiber optic sensingfiber optic sensingfrequency domainhigh resolutionlaser sweepmetrologynonlinearity compensationstraintemperature

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Area of Science:

  • Optoelectronics
  • Fiber Optic Sensing
  • Metrology

Background:

  • Optical frequency-domain reflectometry (OFDR) is crucial for high-resolution measurements.
  • Specialty optical fibers enable advanced sensing applications.
  • Improving metrological characteristics of OFDR systems is an ongoing challenge.

Purpose of the Study:

  • To review recent advancements in OFDR design and digital signal processing.
  • To analyze the performance of OFDR-based sensors for various physical quantities.
  • To explore the integration of frequency-domain and time-domain reflectometry for novel sensing.

Main Methods:

  • Summarizing state-of-the-art OFDR design and signal processing techniques.
  • Analyzing performance metrics like spatial resolution, SNR, and dynamic range.
  • Reviewing sensor applications for temperature, deformation, and impact detection.

Main Results:

  • Significant improvements in metrological characteristics of OFDR systems.
  • Enhanced accuracy in spatial localization and measurement of physical quantities using OFDR sensors.
  • Emerging possibilities from integrating frequency-domain and time-domain reflectometry.

Conclusions:

  • OFDR technology and fiber optic sensors continue to advance rapidly.
  • Integration of different reflectometry domains offers expanded sensing capabilities.
  • This review provides valuable insights for developing advanced optical sensing systems.