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Related Concept Videos

Discrete Fourier Transform01:15

Discrete Fourier Transform

The Discrete Fourier Transform (DFT) is a fundamental tool in signal processing, extending the discrete-time Fourier transform by evaluating discrete signals at uniformly spaced frequency intervals. This transformation converts a finite sequence of time-domain samples into frequency components, each representing complex sinusoids ordered by frequency. The DFT translates these sequences into the frequency domain, effectively indicating the magnitude and phase of each frequency component present...

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Related Experiment Video

Updated: Jul 6, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Published on: November 7, 2016

Frequency-derived distributed optical-fiber sensing technique: theory and characterization.

F Parvaneh1, V A Handerek, A J Rogers

  • 1Department of Electronic Engineering, King's College London, Strand, London WC2R 2LS, UK. farhad.parvaneh@kcl.ac.uk

Applied Optics
|March 18, 2008
PubMed
Summary
This summary is machine-generated.

Frequency-derived distributed optical-fiber sensing enables remote measurement of birefringence in optical fibers. This technique uses a pump-probe scheme and the optical Kerr effect for precise spatial mapping of external influences.

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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Last Updated: Jul 6, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
09:48

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Published on: November 7, 2016

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Area of Science:

  • Optics and Photonics
  • Fiber Optic Sensing Technology
  • Materials Science

Background:

  • Distributed optical-fiber sensing allows for remote measurement of physical parameters along an optical fiber.
  • Birefringence in optical fibers is sensitive to external factors like strain and temperature.
  • Existing methods may have limitations in spatial resolution or measurement range.

Purpose of the Study:

  • To introduce and theoretically analyze a novel frequency-derived distributed optical-fiber sensing method.
  • To demonstrate the capability of measuring the spatial distribution of linear birefringence.
  • To validate the technique through experimental results and theoretical comparison.

Main Methods:

  • Utilizing a pump-probe scheme to induce and detect changes in the optical fiber.
  • Employing the optical Kerr effect to generate a frequency-modulated probe beam.
  • Applying Jones calculus and Poincaré sphere representations for theoretical analysis.

Main Results:

  • The developed method successfully maps the spatial distribution of linear birefringence.
  • Experimental results show strong agreement with the theoretical predictions.
  • The technique provides a means to remotely measure external measurands influencing birefringence.

Conclusions:

  • Frequency-derived distributed optical-fiber sensing is a viable technique for precise remote measurements.
  • The theoretical framework provides a solid foundation for understanding and optimizing the method.
  • This sensing approach offers potential for various applications requiring distributed strain or temperature monitoring.