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Updated: Feb 2, 2026
08:48
Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
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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
Summary
A new model simplifies designing fiber optic sensors. This robust design uses microresonators to detect substances by analyzing light interactions, validated by experimental data.
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.
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