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Related Experiment Video

Updated: Jul 7, 2026

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

Published on: January 7, 2019

High-resolution photoelastic pressure sensor using low-birefringence fiber.

A Bertholds1, R Dändliker

  • 1Université de Neuchâtel, Institut de Microtechnique, CH-2000 Neuchâtel, Switzerland.

Applied Optics
|February 1, 1986
PubMed
Summary

This study demonstrates a novel fiber optic sensor for precise force and pressure measurement. The sensor utilizes lateral force-induced birefringence in single-mode fibers, achieving high resolution for detecting small force increments.

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Area of Science:

  • Optoelectronics
  • Fiber optic sensing
  • Materials science

Background:

  • Lateral forces induce birefringence in optical fibers.
  • Birefringence can be exploited for sensor applications.
  • High-resolution force and pressure sensing remains a challenge.

Purpose of the Study:

  • To investigate the use of lateral force-induced birefringence in single-mode fibers for high-resolution force/pressure measurement.
  • To develop and calibrate a novel fiber optic sensor configuration.
  • To determine the sensitivity and performance limits of the proposed sensor.

Main Methods:

  • Utilized a single-mode fiber sensor configuration.
  • Applied calibrated weights to investigate the sensor's response.

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  • Measured the induced birefringence due to lateral forces.
  • Employed an extended detecting surface for enhanced sensitivity.

    • Main Results:

    • The sensor demonstrated high resolution in measuring absolute force and pressure.
    • Achieved sensitivity to incremental forces as low as 2 x 10(-3) N.
    • The sensor's performance was independent of fiber length.
    • Maximum applied force reached 10 N/m of fiber length.

    Conclusions:

    • Lateral force-induced birefringence in single-mode fibers offers a viable method for high-resolution force/pressure sensing.
    • The developed sensor configuration shows promise for practical applications requiring precise force detection.
    • The sensor's independence of fiber length simplifies implementation and scalability.