Real-time acceleration sensing with an arctan algorithm based on a modal interferometer

Gang Zhang; Xuqiang Wu; Qiang Ge; Shili Li; Jinhui Shi; Wei Liu; Cheng Zuo; Benli Yu

doi:10.1364/AO.58.003945

Applied Optics
Vol. 58,
Issue 14,
pp. 3945-3949
(2019)
•https://doi.org/10.1364/AO.58.003945

Real-time acceleration sensing with an arctan algorithm based on a modal interferometer

Gang Zhang, Xuqiang Wu, Qiang Ge, Shili Li, Jinhui Shi, Wei Liu, Cheng Zuo, and Benli Yu

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Gang Zhang, Xuqiang Wu, Qiang Ge, Shili Li, Jinhui Shi, Wei Liu, Cheng Zuo, and Benli Yu, "Real-time acceleration sensing with an arctan algorithm based on a modal interferometer," Appl. Opt. 58, 3945-3949 (2019)

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Related Topics
Table of Contents Category
- Fiber Optics, Fiber Sensors, and Optical Communications
Optics & Photonics Topics
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The topics in this list come from the Optics and Photonics Topics applied to this article.

About this Article
History
- Original Manuscript: March 4, 2019
- Revised Manuscript: March 30, 2019
- Manuscript Accepted: April 15, 2019
- Published: May 10, 2019

Abstract

This study proposes a fiber-optic accelerometer for low-frequency vibration signal detection. The phase velocities of the polarization eigenmodes are affected differently by signals, leading to a polarization rotation of the transmitted lights. The orthogonal square roots of the photovoltages are utilized for an arctan demodulation scheme. Experimental results show that it provides a flat response of 75.04 mrad/g, an average resolution of 13.44 μg/√Hz, and a dynamic range of 111.62 dB below 180 Hz. The environmental instability and sensor complexity are significantly reduced, so that the sensor can be further used in the warning of coal and gas outburst.

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Supplementary Material (2)

Name	Description
Data File 1	Experimental results
Visualization 1	Sensitivity test @ 50 Hz

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Components	Parameters
Sensing PMF	$L = 0.86 m$ , $c = 28.4 mm$ , $d = 29 mm$
RIO Orion laser	$λ = 1550 nm$
ABS disk with fiber coils and cylinder mass	$E = 0.46 GPa$ , $ν = 0.394$ , $a = 42 mm$ , $b = 10 mm$ , $h = 1.3 mm$ , $M = 3.54 gram$

Type	Sensitivity	Resolution	Dynamic Range	Complexity	Stability
Our sensor	75.04 mrad/g	$13.44 μg / \sqrt Hz$	111.62 dB	Low	High
Polarization-based sensor [5]	97.80 mV/g	102 mg/√Hz	42.92 dB	Low	Medium
Polarization-based sensor [6]	27.15 mrad/g	10.2 mg/√Hz	Unknown	Low	Medium
Offset splicing-based sensor [7]	1.11 mV/g	1.36 mg/√Hz	Unknown	Low	Low
Thin core fiber-based sensor [8]	1.51 mV/g	3.3 mg/√Hz	Unknown	Low	Low
Tilted grating-based sensor [10]	10.78 V/g	2 mg/√Hz	Unknown	High	Medium
Tilted grating-based sensor [11]	2.48 V/g	2 mg/√Hz	Unknown	High	High
Tilted grating-based sensor [16]	0.79 V/g	Unknown	Unknown	High	Medium

Components	Parameters
Sensing PMF	$L = 0.86 m$ , $c = 28.4 mm$ , $d = 29 mm$
RIO Orion laser	$λ = 1550 nm$
ABS disk with fiber coils and cylinder mass	$E = 0.46 GPa$ , $ν = 0.394$ , $a = 42 mm$ , $b = 10 mm$ , $h = 1.3 mm$ , $M = 3.54 gram$

Type	Sensitivity	Resolution	Dynamic Range	Complexity	Stability
Our sensor	75.04 mrad/g	$13.44 μg / \sqrt Hz$	111.62 dB	Low	High
Polarization-based sensor [5]	97.80 mV/g	102 mg/√Hz	42.92 dB	Low	Medium
Polarization-based sensor [6]	27.15 mrad/g	10.2 mg/√Hz	Unknown	Low	Medium
Offset splicing-based sensor [7]	1.11 mV/g	1.36 mg/√Hz	Unknown	Low	Low
Thin core fiber-based sensor [8]	1.51 mV/g	3.3 mg/√Hz	Unknown	Low	Low
Tilted grating-based sensor [10]	10.78 V/g	2 mg/√Hz	Unknown	High	Medium
Tilted grating-based sensor [11]	2.48 V/g	2 mg/√Hz	Unknown	High	High
Tilted grating-based sensor [16]	0.79 V/g	Unknown	Unknown	High	Medium

Abstract

Supplementary Material (2)

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Figures (11)

Tables (2)

Equations (6)

Applied Optics