Quadrature phase detection based on an extrinsic Fabry–Pérot interferometer for vibration measurement | Zendy

Zihua Zhang | Zendy; Chunlei Jiang | Zendy; Fuli Wang | Zendy; Zhen Huang | Zendy; Liqun Shen | Zendy; Chengwei Li | Zendy

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Quadrature phase detection based on an extrinsic Fabry–Pérot interferometer for vibration measurement

Author(s) -

Zihua Zhang,

Chunlei Jiang,

Fuli Wang,

Zhen Huang,

Liqun Shen,

Chengwei Li

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.403913

Subject(s) - fabry–pérot interferometer , interferometry , optics , quadrature (astronomy) , demodulation , vibration , physics , optical fiber , signal (programming language) , acoustics , computer science , telecommunications , laser , channel (broadcasting) , programming language

A novel vibration measurement system based on a fiber-optic extrinsic Fabry-Pérot interferometer is established. Two quadrature interferometry signals are obtained in accordance with the 90° phase shift between two output arms of a 2×2 fiber coupler. This outcome drastically simplifies the processing of collected data because only a single arctangent operation is needed to calculate the wrapped phase. Repetitive test results show that the relative micro-vibration reconstruction error of this method is less than 0.12%. This structure simplifies the extrinsic Fabry-Pérot signal demodulation process, which has guiding significance for the online measurement of high-precision physical quantities.

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