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Related Experiment Video

Updated: Feb 14, 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

Fiber-Optic Pyrometer with Optically Powered Switch for Temperature Measurements.

Carmen Vázquez¹, Sandra Pérez-Prieto², Juan D López-Cardona³

¹Electronics Technology Department, University Carlos III of Madrid, 28911 Leganés, Spain. cvazquez@ing.uc3m.es.

Sensors (Basel, Switzerland)

|February 9, 2018

Summary

This summary is machine-generated.

This study introduces a new infrared fiber-optic pyrometer for precise, high-speed temperature measurements. It also details an optically powered fiber optic switch for reliable reference signals in pyrometric systems.

Keywords:

contactless temperature sensor fiber-optic lock-in amplifier optical chopper optical switch power over fiber pyrometer

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Area of Science:

Instrumentation and Measurement
Optical Engineering
Thermal Science

Background:

Accurate, high-speed temperature measurement is crucial in many industrial and research applications.
Traditional pyrometry can be limited by electromagnetic interference and the need for complex wiring.
Optical fiber technology offers potential solutions for remote sensing and signal transmission in harsh environments.

Purpose of the Study:

To develop and experimentally validate a novel infrared fiber-optic pyrometer for localized, high-speed temperature measurements.
To design and test an optically powered optical fiber switch for use as a reference signal source in fiber-optic pyrometers.
To demonstrate the feasibility of remote optical powering for optical switches over significant distances.

Main Methods:

Utilized low-noise photodetectors and high-gain transimpedance amplifiers for the pyrometer.
Implemented a single gain mode across the entire temperature measurement range (170–530 °C).
Developed a shutter mechanism based on an optical fiber switch, powered remotely via optical means.

Main Results:

The infrared fiber-optic pyrometer achieved accurate temperature measurements from 170 to 530 °C.
The optically powered optical fiber switch successfully provided a reference signal for pyrometry (200–550 °C).
Remote optical powering demonstrated the capability to power a 300 mW switch at 100 m, eliminating electromagnetic interference.

Conclusions:

The developed infrared fiber-optic pyrometer is suitable for localized, high-speed temperature monitoring.
Optically powered fiber optic switches offer a robust solution for reference signal generation in pyrometry.
Remote optical powering is a viable technique for powering optical components in measurement systems, enhancing reliability and reducing interference.