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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

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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Related Experiment Video

Updated: Jun 19, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
09:48

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Distributed temperature-change sensor based on Rayleigh backscattering in an optical fiber.

R Rathod, R D Pechstedt, D A Jackson

    Optics Letters
    |October 22, 2009
    PubMed
    Summary

    This study introduces a new fiber optic sensor for precise temperature monitoring. The system effectively detects subtle temperature changes and pinpoints their location along the fiber with high accuracy.

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    08:44

    Fabrication and Testing of Photonic Thermometers

    Published on: October 24, 2018

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    Last Updated: Jun 19, 2026

    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
    09:48

    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

    Published on: November 7, 2016

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
    09:03

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

    Published on: January 7, 2019

    Fabrication and Testing of Photonic Thermometers
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    Fabrication and Testing of Photonic Thermometers

    Published on: October 24, 2018

    Area of Science:

    • Physics
    • Optical Engineering
    • Materials Science

    Background:

    • Optical fibers are widely used in sensing applications.
    • Temperature monitoring is crucial in various industrial and scientific fields.
    • Existing methods for fiber optic temperature sensing have limitations in sensitivity or spatial resolution.

    Purpose of the Study:

    • To develop and demonstrate a novel fiber optic sensing system for accurate temperature change detection.
    • To achieve high sensitivity in measuring temperature variations using Rayleigh-backscattered light.
    • To establish a precise spatial resolution for localized temperature measurements.

    Main Methods:

    • Utilizing a frequency-modulated continuous-wave (FMCW) technique.
    • Analyzing frequency shifts in Rayleigh-backscattered light within a single-mode optical fiber.
    • Heating a specific 20-cm length of the optical fiber to induce temperature changes.

    Main Results:

    • The system successfully detected temperature changes with a rate as low as 0.014 K/s.
    • A spatial resolution of better than 15 cm was achieved for temperature measurements.
    • Demonstrated the capability to pinpoint the location of temperature variations along the fiber.

    Conclusions:

    • The developed FMCW-based fiber optic sensor offers a sensitive and spatially resolved method for temperature monitoring.
    • This technique shows promise for applications requiring precise, localized temperature measurements.
    • The system's performance validates its potential for advanced fiber optic sensing applications.