A high-finesse fiber optic Fabry-Perot interferometer based magnetic-field sensor

Feifei Chen; Yi Jiang; Hongchun Gao; Lan Jiang

doi:10.1016/j.optlaseng.2015.03.013

A high-finesse fiber optic Fabry-Perot interferometer based magnetic-field sensor

Feifei Chen, Yi Jiang^*, Hongchun Gao, Lan Jiang

^*Corresponding author for this work

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

A high-finesse extrinsic Fabry-Perot interferometric sensor for the measurement of weak dc magnetic fields is demonstrated. The Fabry-Perot cavity is formed by aligning the fiber end-face and the TbDyFe rod end-face, and each end-face is coated by a mirror with a micro-lens. The length of the TbDyFe rod is changed by the variation of an applied dc magnetic field, leading a change of the Fabry-Perot cavity length. By interrogating the white-light interferometric spectrum, the wavelength of the resonant peak is tracked and the length of the Fabry-Perot cavity is obtained. The sensor exhibits a high sensitivity of 1510 nm/mT with a magnetic resolution of 25 nT.

Original language	English
Pages (from-to)	62-65
Number of pages	4
Journal	Optics and Lasers in Engineering
Volume	71
DOIs	https://doi.org/10.1016/j.optlaseng.2015.03.013
Publication status	Published - 1 Aug 2015

Keywords

Extrinsic Fabry-Perot
Fiber optic sensors
High-finesse
Magnetic field

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10.1016/j.optlaseng.2015.03.013

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title = "A high-finesse fiber optic Fabry-Perot interferometer based magnetic-field sensor",

abstract = "A high-finesse extrinsic Fabry-Perot interferometric sensor for the measurement of weak dc magnetic fields is demonstrated. The Fabry-Perot cavity is formed by aligning the fiber end-face and the TbDyFe rod end-face, and each end-face is coated by a mirror with a micro-lens. The length of the TbDyFe rod is changed by the variation of an applied dc magnetic field, leading a change of the Fabry-Perot cavity length. By interrogating the white-light interferometric spectrum, the wavelength of the resonant peak is tracked and the length of the Fabry-Perot cavity is obtained. The sensor exhibits a high sensitivity of 1510 nm/mT with a magnetic resolution of 25 nT.",

keywords = "Extrinsic Fabry-Perot, Fiber optic sensors, High-finesse, Magnetic field",

author = "Feifei Chen and Yi Jiang and Hongchun Gao and Lan Jiang",

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T1 - A high-finesse fiber optic Fabry-Perot interferometer based magnetic-field sensor

AU - Chen, Feifei

AU - Jiang, Yi

AU - Gao, Hongchun

AU - Jiang, Lan

PY - 2015/8/1

Y1 - 2015/8/1

N2 - A high-finesse extrinsic Fabry-Perot interferometric sensor for the measurement of weak dc magnetic fields is demonstrated. The Fabry-Perot cavity is formed by aligning the fiber end-face and the TbDyFe rod end-face, and each end-face is coated by a mirror with a micro-lens. The length of the TbDyFe rod is changed by the variation of an applied dc magnetic field, leading a change of the Fabry-Perot cavity length. By interrogating the white-light interferometric spectrum, the wavelength of the resonant peak is tracked and the length of the Fabry-Perot cavity is obtained. The sensor exhibits a high sensitivity of 1510 nm/mT with a magnetic resolution of 25 nT.

AB - A high-finesse extrinsic Fabry-Perot interferometric sensor for the measurement of weak dc magnetic fields is demonstrated. The Fabry-Perot cavity is formed by aligning the fiber end-face and the TbDyFe rod end-face, and each end-face is coated by a mirror with a micro-lens. The length of the TbDyFe rod is changed by the variation of an applied dc magnetic field, leading a change of the Fabry-Perot cavity length. By interrogating the white-light interferometric spectrum, the wavelength of the resonant peak is tracked and the length of the Fabry-Perot cavity is obtained. The sensor exhibits a high sensitivity of 1510 nm/mT with a magnetic resolution of 25 nT.

KW - Extrinsic Fabry-Perot

KW - Fiber optic sensors

KW - High-finesse

KW - Magnetic field

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DO - 10.1016/j.optlaseng.2015.03.013

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EP - 65

JO - Optics and Lasers in Engineering

JF - Optics and Lasers in Engineering

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A high-finesse fiber optic Fabry-Perot interferometer based magnetic-field sensor

Abstract

Keywords

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