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

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Location deviation compensation based on maximum cross correlation in optical frequency domain reflectometry.

Yuanze Xue, Xuefeng Wang, Caijie Tang

|November 22, 2021

Summary

This summary is machine-generated.

A novel algorithm using maximum cross correlation compensates location deviation in optical frequency domain reflectometry systems. This method reduces demodulation errors caused by environmental factors affecting the fiber under test and auxiliary interferometer.

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Area of Science:

Optoelectronics
Fiber optic sensing
Metrology

Background:

Optical frequency domain reflectometry (OFDR) systems are susceptible to location deviations.
Environmental factors like strain and temperature alter fiber characteristics, inducing these deviations.
Existing compensation methods do not simultaneously address deviations from both the fiber under test and auxiliary interferometer.

Purpose of the Study:

To propose and validate a location deviation compensation algorithm for OFDR systems.
To simultaneously correct location deviations caused by the fiber under test and the auxiliary interferometer.
To minimize demodulation errors in OFDR measurements.

Main Methods:

Development of a location deviation compensation algorithm utilizing maximum cross correlation.
Experimental validation involving temperature variation tests on both the fiber under test and the auxiliary interferometer.
Comparative analysis against existing compensation techniques.

Main Results:

The proposed algorithm effectively compensates for location deviations in OFDR systems.
Simultaneous compensation for deviations originating from the fiber under test and auxiliary interferometer was achieved.
Demodulation errors introduced by location deviation were significantly minimized.

Conclusions:

The maximum cross correlation-based algorithm offers a robust solution for location deviation compensation in OFDR.
This approach enhances the accuracy and reliability of OFDR measurements under varying environmental conditions.
The method provides a significant improvement over current compensation strategies.