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Updated: Feb 19, 2026

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

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

Published on: January 7, 2019

Optical fiber temperature sensor based on a microcavity with polymer overlay.

Iván Hernández-Romano, Miguel A Cruz-Garcia, Carlos Moreno-Hernández

|November 3, 2017

Summary

A new fiber optic temperature sensor uses a Poly(dimethylsiloxane) (PDMS) coating on a microcavity for high accuracy. This cost-effective sensor is ideal for microfluidic and biological applications.

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Area of Science:

Materials Science
Optics and Photonics
Sensor Technology

Background:

Accurate temperature sensing is crucial in microfluidics and biological systems.
Existing fiber optic sensors may lack the required compactness, cost-effectiveness, or sensitivity for specific applications.

Purpose of the Study:

To propose and demonstrate an ultracompact, cost-effective, and highly accurate fiber optic temperature sensor.
To leverage the thermo-optic properties of Poly(dimethylsiloxane) (PDMS) for enhanced temperature sensitivity.

Main Methods:

Fabrication of a sensing head with a Fabry-Perot microcavity using a titanium dioxide (TiO2) film and a single-mode fiber segment coated with PDMS.
Monitoring the reflectance changes at the fiber-PDMS interface due to temperature variations.

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Last Updated: Feb 19, 2026

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

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Published on: January 7, 2019

Fabrication and Testing of Photonic Thermometers

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Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

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Quantifying interference pattern amplitude changes by analyzing pattern visibility using fast Fourier transform.

Main Results:

The developed sensor demonstrated a linear response to temperature changes.
High sensitivity and a rapid response time of 14 seconds were achieved.
The sensor's performance was validated through interference pattern analysis.

Conclusions:

The proposed fiber optic temperature sensor offers a compelling combination of microscopic dimensions and high performance.
Its characteristics make it suitable for temperature monitoring in PDMS microfluidic circuits.
Potential applications in biological sensing due to its accuracy and cost-effectiveness.