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  1. Home
  3. Long Period Grating-based Fiber Coupling To Wgm Microresonators.
  1. Home
  3. Long Period Grating-based Fiber Coupling To Wgm Microresonators.

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Long Period Grating-Based Fiber Coupling to WGM Microresonators.

Francesco Chiavaioli1, Dario Laneve2, Daniele Farnesi3

  • 1Institute of Applied Physics "Nello Carrara" (IFAC), National Research Council of Italy (CNR), Via Madonna del Piano 10, Sesto Fiorentino, 50019 Firenze, Italy. f.chiavaioli@ifac.cnr.it.

Micromachines
|November 15, 2018

View abstract on PubMed

Summary
This summary is machine-generated.

A new model simplifies designing fiber optic sensors. This robust design uses microresonators to detect substances by analyzing light interactions, validated by experimental data.

Keywords:
chemical/biological sensingdistributed sensingfiber couplinglong period gratingmicroresonatorwhispering gallery mode

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Area of Science:

  • Photonics and optical sensing technology.
  • Development of advanced fiber optic sensor systems.

Background:

  • Whispering gallery modes (WGMs) are sensitive to microresonator properties.
  • All-in-fiber setups offer compact and robust optical sensing solutions.

Purpose of the Study:

  • To present a comprehensive model for designing all-in-fiber microresonator-based optical sensing setups.
  • To enable selective excitation of high-Q WGMs in microresonators within an all-fiber configuration.

Main Methods:

  • Utilized a pair of identical long period gratings (LPGs) in a single optical fiber.
  • Employed microspheres and microbubbles as microresonators side-coupled to a fiber taper.
  • Developed a comprehensive model for simulating light excitation of WGMs.

Main Results:

  • The model accurately predicts the behavior of the all-in-fiber sensing setup.
  • Simulated results showed good agreement with experimental data, validating the model's effectiveness.
  • Demonstrated the potential for sensing substances based on refractive index and absorption characteristics.

Conclusions:

  • The developed model provides a robust framework for designing fiber optic microresonator sensors.
  • The all-in-fiber configuration is effective for selective WGM excitation and sensing applications.
  • The model can predict the sensing of various substances and pollutants.