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Updated: May 24, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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An intrinsic fiber-optic single loop micro-displacement sensor.

Alejandro Martinez-Rios1, David Monzon-Hernandez, Ismael Torres-Gomez

  • 1Centro de Investigaciones en Optica, Loma del Bosque 115, Col. Lomas del Campestre, Leon, Guanajuato, 37150, Mexico. amr6@cio.mx

Sensors (Basel, Switzerland)
|February 28, 2012
PubMed
Summary
This summary is machine-generated.

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This study introduces a novel micro-displacement sensor using a tapered fiber loop. It achieves high sensitivity for precise measurement of small movements.

Area of Science:

  • Optoelectronics
  • Fiber Optics Sensors
  • Nanotechnology

Background:

  • Fiber optic sensors are crucial for precise measurements.
  • Tapered fibers offer unique light propagation characteristics.
  • Deformation-induced mode coupling is a known phenomenon.

Purpose of the Study:

  • To develop a micro-displacement sensor using a tapered fiber loop.
  • To investigate the relationship between loop deformation and spectral shifts.
  • To evaluate the sensor's sensitivity and performance.

Main Methods:

  • Fabrication of a fiber loop from a tapered fiber.
  • Excitation of cladding modes and analysis of transmission spectra.
  • Utilizing a linear translation stage to induce displacement and vary loop diameter.
Keywords:
displacement sensorfiber loopfiber sensorstapered fiber

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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

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Last Updated: May 24, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

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

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

  • Employing a broadband LED source and a photodetector for power transmission measurements.

    • Main Results:

    • Observed transmission spectrum with notches sensitive to loop diameter changes.
    • Demonstrated a maximum wavelength shift of 360.93 nm over a 3.125 mm displacement range.
    • Achieved a high sensitivity of 0.116 nm/μm for wavelength shift.
    • Obtained a power sensitivity of 2.7 nW/μm in a 1 mm range.

    Conclusions:

    • The proposed tapered fiber loop sensor is effective for micro-displacement sensing.
    • The sensor exhibits high sensitivity and is easy to implement.
    • Further improvements in performance are possible, indicating potential for advanced applications.