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IR Spectrometers

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

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Updated: Mar 21, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Interferometric high temperature sensor using suspended-core optical fibers.

Linh Viet Nguyen, Stephen C Warren-Smith, Heike Ebendorff-Heidepriem

|May 4, 2016

Summary

This summary is machine-generated.

This study introduces a novel high-temperature fiber sensor utilizing multimode interference in suspended-core microstructured optical fibers. The sensor accurately measures temperatures up to 1100°C, offering a simple and cost-effective solution.

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Area of Science:

Optical Fiber Sensing
Materials Science
Nanotechnology

Background:

Accurate high-temperature sensing is critical for various industrial applications.
Existing fiber optic sensors often face limitations at extreme temperatures.
Microstructured optical fibers offer unique light manipulation properties.

Purpose of the Study:

To demonstrate a novel high-temperature fiber sensor.
To utilize the multimode interference effect for temperature sensing.
To achieve reliable sensing beyond 1000°C.

Main Methods:

Employing a suspended-core microstructured optical fiber (SCF).
Analyzing interference fringe shifts using Fast Fourier Transform (FFT) filtering.
Monitoring sensor phase at dominant spatial frequencies for interrogation.

Main Results:

Demonstrated red-shifting of interference fringes with increasing temperature.
Successfully performed temperature sensing up to 1100°C.
Maintained stable phase monitoring over 80 hours for temperature change scenarios.

Conclusions:

The proposed SCF sensor offers a simple and cost-effective solution for high-temperature sensing.
The sensor is capable of operating reliably beyond 1000°C.
This technology has potential applications in extreme environment monitoring.