Analysis of single-mode fiber-optic extrinsic Fabry-Perot interferometric sensors with planar metal mirrors

Qiwen Sheng; Guigen Liu; Nezam Uddin; Ming Han

doi:10.1364/AO.431364

Analysis of single-mode fiber-optic extrinsic Fabry-Perot interferometric sensors with planar metal mirrors

Qiwen Sheng, Guigen Liu, Nezam Uddin, Ming Han

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

2 Scopus citations

Abstract

We theoretically study the spectral characteristics and noise performance of wavelength-interrogated fiber-optic sensors based on an extrinsic Fabry-Perot (FP) interferometer (EFPI) formed by thin metal mirrors. We develop a model and use it to analyze the effect of key sensor parameters on the visibility and spectral width of the sensors, including the beam width of the incident light, metal coating film thickness, FP cavity length, and wedge angle of the two mirrors. Through Monte Carlo simulations, we obtain an empirical equation that can be used to estimate the wavelength resolution from the visibility and spectral width, which can be used as a figure-of-merit that is inherent to the sensor and independent on the system noises. The work provides a useful tool for designing, constructing, and interrogating high-resolution fiber-optic EFPI sensors.

Original language	English (US)
Pages (from-to)	7894-7902
Number of pages	9
Journal	Applied optics
Volume	60
Issue number	26
DOIs	https://doi.org/10.1364/AO.431364
State	Published - Sep 10 2021
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.431364

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title = "Analysis of single-mode fiber-optic extrinsic Fabry-Perot interferometric sensors with planar metal mirrors",

abstract = "We theoretically study the spectral characteristics and noise performance of wavelength-interrogated fiber-optic sensors based on an extrinsic Fabry-Perot (FP) interferometer (EFPI) formed by thin metal mirrors. We develop a model and use it to analyze the effect of key sensor parameters on the visibility and spectral width of the sensors, including the beam width of the incident light, metal coating film thickness, FP cavity length, and wedge angle of the two mirrors. Through Monte Carlo simulations, we obtain an empirical equation that can be used to estimate the wavelength resolution from the visibility and spectral width, which can be used as a figure-of-merit that is inherent to the sensor and independent on the system noises. The work provides a useful tool for designing, constructing, and interrogating high-resolution fiber-optic EFPI sensors.",

author = "Qiwen Sheng and Guigen Liu and Nezam Uddin and Ming Han",

note = "Funding Information: Funding. National Science Foundation (1918074); Office of Naval Research (N000142012562). Publisher Copyright: {\textcopyright} 2021 Optical Society of America",

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AU - Sheng, Qiwen

AU - Liu, Guigen

AU - Uddin, Nezam

AU - Han, Ming

PY - 2021/9/10

Y1 - 2021/9/10

N2 - We theoretically study the spectral characteristics and noise performance of wavelength-interrogated fiber-optic sensors based on an extrinsic Fabry-Perot (FP) interferometer (EFPI) formed by thin metal mirrors. We develop a model and use it to analyze the effect of key sensor parameters on the visibility and spectral width of the sensors, including the beam width of the incident light, metal coating film thickness, FP cavity length, and wedge angle of the two mirrors. Through Monte Carlo simulations, we obtain an empirical equation that can be used to estimate the wavelength resolution from the visibility and spectral width, which can be used as a figure-of-merit that is inherent to the sensor and independent on the system noises. The work provides a useful tool for designing, constructing, and interrogating high-resolution fiber-optic EFPI sensors.

AB - We theoretically study the spectral characteristics and noise performance of wavelength-interrogated fiber-optic sensors based on an extrinsic Fabry-Perot (FP) interferometer (EFPI) formed by thin metal mirrors. We develop a model and use it to analyze the effect of key sensor parameters on the visibility and spectral width of the sensors, including the beam width of the incident light, metal coating film thickness, FP cavity length, and wedge angle of the two mirrors. Through Monte Carlo simulations, we obtain an empirical equation that can be used to estimate the wavelength resolution from the visibility and spectral width, which can be used as a figure-of-merit that is inherent to the sensor and independent on the system noises. The work provides a useful tool for designing, constructing, and interrogating high-resolution fiber-optic EFPI sensors.

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Analysis of single-mode fiber-optic extrinsic Fabry-Perot interferometric sensors with planar metal mirrors

Abstract

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