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Related Experiment Video

Updated: Jun 25, 2025

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

12.0K

A high resolution dilatometer using optical fiber interferometer.

Xin Qin1,2, Guoxin Cao3,4, Mengqiao Geng1,2

  • 1International Center for Quantum Materials, Peking University, Haidian, Beijing 100871, China.

The Review of Scientific Instruments
|May 23, 2024
PubMed
Summary
This summary is machine-generated.

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We developed a cryogenic differential dilatometer using an all-fiber Michelson interferometer. This high-resolution instrument precisely measures thermal expansion in thin, fragile materials, aiding condensed matter physics research.

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Cryogenic Engineering

Background:

  • Accurate measurement of thermal expansion is crucial for understanding phase transitions in materials.
  • Existing dilatometry techniques often lack the resolution or sensitivity required for studying thin or fragile samples.

Purpose of the Study:

  • To introduce a novel, high-performance differential dilatometer capable of cryogenic operation.
  • To achieve ultra-high resolution in measuring length changes (δL/L) and temperature.

Main Methods:

  • Utilizing an all-fiber Michelson interferometer for precise, contactless length change detection.
  • Employing an in situ thermometer for accurate sample temperature monitoring.
  • Operating the system at cryogenic temperatures to study phase transitions.

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Related Experiment Videos

Last Updated: Jun 25, 2025

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

12.0K
Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.4K
A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
00:08

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

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Main Results:

  • Achieved a resolution of 10-10 in relative length change (δL/L).
  • Demonstrated sub-picometer length change resolution and millikelvin temperature resolution.
  • Successfully measured the linear thermal expansion coefficient near the antiferromagnetic transition of BaFe2As2.

Conclusions:

  • The developed dilatometer is a powerful tool for studying phase transitions in condensed matter physics.
  • Offers significant advantages for fragile materials (sub-100 μm thickness) due to high resolution and contactless nature.
  • The prototype design allows for further improvements and integration with synchronous measurements.