Pressure and Temperature Sensor Based on Graphene Diaphragm and Fiber Bragg Gratings

A compact optical fiber sensor based on a Fabry-Perot interferometer (FPI) with an integrated fiber Bragg grating is proposed to measure pressure and temperature simultaneously. The light reflectors of the proposed FPI comprise a graphene film and a fiber end face. The sensitivities of the FPI senso...

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Bibliographic Details
Published in:IEEE photonics technology letters Vol. 30; no. 5; pp. 431 - 434
Main Authors: Dong, Nannan, Wang, Sumei, Jiang, Lan, Jiang, Yi, Wang, Peng, Zhang, Liuchao
Format: Journal Article
Language:English
Published: IEEE 01.03.2018
Subjects:
Cavity resonators
Fabry–Perot interferometers
fiber Bragg gratings
Fiber gratings
Graphene
Pressure measurement
Temperature measurement
Temperature sensors
ISSN:1041-1135, 1941-0174
Online Access:Get full text
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Summary:A compact optical fiber sensor based on a Fabry-Perot interferometer (FPI) with an integrated fiber Bragg grating is proposed to measure pressure and temperature simultaneously. The light reflectors of the proposed FPI comprise a graphene film and a fiber end face. The sensitivities of the FPI sensor for measuring pressure and temperature are 501.4 nm/kPa and 306.2 nm/°C, respectively. Conflicting signals of pressure and temperature can cause cross-impact errors at 610 Pa/°C. The introduction of a fiber Bragg grating can effectively prevent the cross-impact of the FPI sensor. The pressure sensitivity obtained is 7.96 to 12 times higher than the previous study. The proposed fiber sensor can simultaneously measure pressure and temperature using a sensitivity matrix.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2017.2786292