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Triple-sensor multiplexed frequency-modulated continuous-wave interferometric fiber-optic displacement sensor.

¹PhotonTech, Vancouver, British Columbia, Canada. jessezheng@shaw.ca

|April 7, 2007

Summary

A novel triple-sensor fiber-optic displacement sensor simultaneously measures multiple displacements using optical frequency-modulated continuous-wave interference. This technology achieves high accuracy for precise motion tracking applications.

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Last Updated: Jul 15, 2026

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

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Published on: January 7, 2019

Area of Science:

Optoelectronics
Optical sensing technologies
Metrology

Background:

Accurate displacement measurement is crucial in various scientific and industrial fields.
Existing sensors may have limitations in multiplexing capabilities or spatial resolution.

Purpose of the Study:

To introduce a novel triple-sensor multiplexed fiber-optic displacement sensor.
To demonstrate its capability for measuring displacements of multiple objects or 3D displacement of a single object.

Main Methods:

Utilizes optical frequency-modulated continuous-wave (FMCW) interference.
Employs frequency-division multiplexing to separate signals from individual sensors.
Analyzes phase shifts of separated beat signals to determine displacement.

Main Results:

Achieved an accuracy of 0.08 micrometers within a 1000 micrometer dynamic range.
Demonstrated simultaneous displacement measurement of three objects or 3D displacement.
Evaluated and quantified crosstalk between sensors.

Conclusions:

The developed sensor offers simultaneous, high-accuracy displacement measurement.
The frequency-division multiplexing approach effectively separates sensor signals.
This technology has potential for advanced metrology and motion tracking.