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Updated: May 16, 2026

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
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Mode couplings and elasto-optic effects study in a proposed mechanical microperturbed multimode optical fiber sensor.

Anthony Bichler1, Sylvain Lecler, Bruno Serio

  • 1InESS-Photonic, Strasbourg University, CNRS, 2012, BP 10413, Illkirch F-67412, France.

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|December 4, 2012
PubMed
Summary

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Researchers investigated microperturbed optical fibers for stretching sensors. Mechanical squeezing deforms the fiber, modulating its refractive index and enabling precise strain measurement.

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Sensor Technology

Background:

  • Microperturbations in optical fibers can induce mode coupling.
  • Existing models often simplify mode coupling for microbend sensors.
  • Accurate modeling is crucial for novel fiber optic transducer applications.

Purpose of the Study:

  • Theoretically investigate a step-index multimode optical fiber with microscale perturbations.
  • Analyze the impact of mechanical squeezing on fiber deformation and refractive index modulation.
  • Evaluate the validity of simplified models versus rigorous electromagnetic mode coupling calculations.

Main Methods:

  • Theoretical investigation of a microperturbed optical fiber.
  • Mechanical squeezing using microstructured jaws to induce periodic deformation.

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Last Updated: May 16, 2026

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  • Rigorous computation of electromagnetic mode couplings using the Marcuse model for a large multimode fiber.
  • Inclusion of anisotropic elasto-optic effects for comprehensive modeling.

    • Main Results:

    • Microperturbations cause periodic elliptical core deformation and refractive index modulation.
    • Mode coupling occurs directly between guided and radiated modes due to micrometer-scale perturbation periods.
    • Rigorous electromagnetic mode coupling calculations provide a more accurate understanding compared to simplified models.
    • Anisotropic elasto-optic effects significantly influence transducer behavior.

    Conclusions:

    • The study provides a physically explained model for microperturbed optical fiber transmission.
    • The proposed transducer demonstrates potential for future stretching sensor applications.
    • Accurate modeling, including elasto-optic effects, is essential for understanding and optimizing such sensors.