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Pressure vector sensor based on an orthogonal optical path Sagnac interferometer.

Xuelan He, Chao Ma, Xianbin Wang

|April 1, 2020

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A new PANDA fiber optic sensor detects pressure using a Sagnac interferometer. Embedded in aluminum, it shows high sensitivity for advanced pressure sensing applications.

Area of Science:

Fiber optic sensing
Optical interferometry
Materials science

Background:

Conventional pressure sensors face limitations in sensitivity and applicability.
Optical fiber sensors offer advantages like immunity to electromagnetic interference and remote sensing capabilities.

Purpose of the Study:

To propose and demonstrate a novel pressure vector sensor.
To investigate the sensor's performance in freeform and embedded states.
To analyze the influence of embedding direction on sensor characteristics.

Main Methods:

Fabrication of a PANDA fiber Sagnac interferometer with a gold film coating.
Magnetron sputtering for gold film deposition.
Ultrasonic consolidation technology for embedding the sensor in aluminum.

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Last Updated: Dec 25, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

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

Experimental analysis of pressure sensitivity and polarization characteristics.

Main Results:

The sensor demonstrated high sensitivity in freeform (2330 pm/(N·m)) and embedded (780 pm/(N·m)) configurations.
The relationship between force direction and pressure sensitivity was studied.
The influence of embedding direction on polarization characteristics was analyzed.

Conclusions:

The proposed PANDA fiber Sagnac interferometer is a viable pressure vector sensor.
The sensor exhibits high sensitivity and potential for various pressure sensing applications.
Simple fabrication and cost-effectiveness make it a competitive candidate.