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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Published on: November 7, 2016

Temperature-Compensated Solution Concentration Measurements Using Photonic Crystal Fiber-Tip Sensors.

Mildred S Cano-Velázquez^1,2, Arthur L Hendriks^1,2, Luca Picelli^1,2

¹Department of Applied Physics and Science Education, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.

Sensors (Basel, Switzerland)

|September 28, 2023

Summary

This summary is machine-generated.

Accurate ethanol concentration measurement is achieved using novel fiber optic sensors. These sensors compensate for temperature variations, ensuring precise readings in aqueous solutions.

Keywords:

chemical sensors in-line measurements optical fiber sensors photonic crystals

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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

Area of Science:

Photonics and Sensor Technology
Chemical Sensing
Optical Instrumentation

Background:

Accurate measurement of ethanol concentration is crucial in various industries.
Temperature fluctuations can significantly impact the accuracy of ethanol concentration sensors.
Existing methods often lack robust temperature compensation, limiting precision.

Purpose of the Study:

To develop and demonstrate a fiber optic sensor system for accurate ethanol concentration measurement in aqueous solutions.
To implement effective temperature compensation for enhanced sensor performance.
To achieve simultaneous measurement of ethanol concentration and temperature.

Main Methods:

Utilized two photonic crystal (PhC) fiber-tip sensors for simultaneous measurement.
One sensor measured ethanol concentration via refractive index (RI) changes.
The second sensor, isolated from the liquid, measured temperature independently.
Employed an optimized PhC design for polarization-independent, low-imprecision wavelength determination.
Combined data from both sensors to compensate for temperature effects.

Main Results:

Demonstrated simultaneous, single-point measurement of temperature and ethanol concentration.
Achieved sensitivities of 19 pm/°C for temperature and ~53 pm/% for ethanol concentration.
Obtained a maximum error of 1.1% in ethanol concentration measurement across a broad temperature range (25-55 °C) after compensation.
Reported a standard deviation of ≤0.8% for concentration measurements.
Demonstrated a limit of detection as low as 0.08% for ethanol concentration under stable temperature conditions.

Conclusions:

The developed fiber optic sensor system with temperature compensation enables accurate ethanol concentration measurements.
The dual-sensor approach effectively mitigates temperature-induced errors, enhancing reliability.
This technology offers a promising solution for precise ethanol sensing in diverse applications.