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Related Experiment Video

Updated: Apr 12, 2026

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Fiber-based distance sensing interferometry.

Klaus Thurner, Francesca Paola Quacquarelli, Pierre-François Braun

|May 14, 2015

Summary

This study introduces a new fiber-optic displacement sensor using a Fabry-Perot cavity for precise measurements. It offers high accuracy and repeatability, suitable for extreme environments.

Area of Science:

Optics and Photonics
Metrology
Sensor Technology

Background:

Fabry-Perot cavities are essential optical resonators.
Interferometric sensors offer high precision for displacement measurements.
Existing sensors face limitations in extreme environments.

Purpose of the Study:

To develop a robust interferometric displacement sensor.
To achieve high-precision measurements over a large range.
To enable sensor operation in harsh conditions.

Main Methods:

Utilizing a folded low-finesse Fabry-Perot cavity.
Implementing a quadrature detection scheme with wavelength modulation of a DFB laser.
Testing performance for displacement, velocity, and environmental resilience.

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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

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Last Updated: Apr 12, 2026

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

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

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

Published on: September 30, 2019

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

Main Results:

The sensor measures displacements up to 1 m at velocities of 2 m/s.
Achieved repeatability of 0.44 nm (3σ) at 20 mm working distance.
Demonstrated high resolution (1 pm) and accuracy (1 nm).

Conclusions:

The developed sensor is suitable for ultrahigh vacuum, cryogenic, and high magnetic field environments.
The sensor supports multichannel applications.
This technology advances precision metrology in challenging settings.