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Related Experiment Video

Updated: May 31, 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

Fast fiber-optic multi-wavelength pyrometer.

Tairan Fu¹, Peng Tan, Chuanhe Pang

¹Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, People's Republic of China. trfu@mail.tsinghua.edu.cn

The Review of Scientific Instruments

|July 5, 2011

Summary

This summary is machine-generated.

A novel fiber-optic multi-wavelength pyrometer measures temperature across UV-Vis-NIR spectra. This system offers fast, remote high-temperature measurements in harsh environments without narrow-band filters.

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Area of Science:

Optical Engineering
Spectroscopy
Metrology

Background:

Accurate high-temperature measurement is crucial in various industrial and research applications.
Existing pyrometry methods can be limited by environmental conditions or spectral range.
Need for robust, versatile temperature sensing in challenging settings.

Purpose of the Study:

To develop and characterize a fast fiber-optic multi-wavelength pyrometer.
To enable remote temperature measurements across a broad spectral range (200-1700 nm).
To assess performance for high-temperature applications in harsh environments.

Main Methods:

Utilized a fiber-optic system with CCD and InGaAs detectors for UV-Vis-NIR spectra.
Employed optical diffraction for selecting multiple wavelengths, avoiding narrow-band filters.
Performed comprehensive calibrations: wavelength, nonlinearity, and radiation response.

Main Results:

Optimized wavelength intervals (Δλ(CCD) = 30 nm, Δλ(InGaAs) = 50 nm) for emissivity models and signal discrimination.
Quantified temperature discrimination across various wavelengths and temperatures.
Verified performance using a high-temperature blackbody and hot metals.

Conclusions:

The developed fiber-optic multi-wavelength pyrometer provides a fast and flexible solution for remote high-temperature measurements.
The system is suitable for use in harsh environments due to fiber-optic transmission.
Offers a viable alternative to traditional pyrometers with improved spectral versatility.