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Related Experiment Videos

Polarimetric fiber laser sensor for hydrostatic pressure.

Klaus Bohnert1, Andreas Frank, Etienne Rochat

  • 1ABB Switzerland, Ltd., Corporate Research, CH-5405 Baden-Daettwil, Switzerland. klaus.bohnert@ch.abb.com

Applied Optics
|January 13, 2004
PubMed
Summary

This study introduces a novel polarimetric fiber laser sensor for measuring high fluid pressure up to 100 MPa. The sensor utilizes differential phase shifts in orthogonal polarization modes to achieve high-resolution pressure sensing.

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Area of Science:

  • Optical sensing
  • Fiber optics
  • Laser physics

Background:

  • Accurate fluid pressure measurement is critical in various industrial and scientific applications.
  • Existing sensors face challenges with resolution, temperature compensation, and robustness under high pressure.
  • Polarimetric fiber laser sensors offer potential for high-sensitivity measurements.

Purpose of the Study:

  • To investigate a polarimetric Fabry-Perot fiber laser sensor for fluid pressure measurement up to 100 MPa.
  • To enhance sensor resolution and temperature compensation.
  • To evaluate the sensor's performance, including fiber integrity and coating effects.

Main Methods:

  • Utilizing a Fabry-Perot fiber laser cavity with two elliptical-core fiber sections.

Related Experiment Videos

  • Employing differential phase shifts between orthogonal polarization modes to detect pressure.
  • Incorporating a second fiber section with a 90-degree core orientation offset for temperature compensation.
  • Leveraging dispersion in birefringent fiber Bragg gratings to improve resolution.

    • Main Results:

    • Demonstrated a fluid pressure sensor capable of measuring up to 100 MPa.
    • Achieved a substantial improvement in sensor resolution, reaching a few parts in 10^6 of the free spectral range.
    • Investigated the effects of fluid pressure on fiber integrity and various fiber coatings.
    • Assessed the intrinsic stability of erbium-doped and undoped sensing fibers.

    Conclusions:

    • The developed polarimetric Fabry-Perot fiber laser sensor is effective for high-pressure fluid measurement.
    • The sensor design provides high resolution and effective temperature compensation.
    • Further research is warranted on fiber integrity and coating optimization for practical applications.