Humidity responsivity of poly(methyl methacrylate)-based optical fiber Bragg grating sensors

Wei Zhang; David J. Webb

doi:10.1364/OL.39.003026

Humidity responsivity of poly(methyl methacrylate)-based optical fiber Bragg grating sensors

Wei Zhang, David J. Webb

Aston Institute of Photonic Technologies (AiPT)

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

Abstract

The humidity response of poly(methyl methacrylate) (PMMA)-based optical fiber Bragg gratings (POFBGs) has been studied. The characteristic wavelength of the grating is modulated by water absorption-induced swelling and refractive index change in the fiber. This work indicates that anisotropic expansion may exist in PMMA optical fiber, reducing the humidity responsivity of the grating and introducing uncertainty in the responsivity from fiber to fiber. By pre-straining a grating, one can get rid of this uncertainty and simultaneously improve the POFBG response time.

Original language	English
Pages (from-to)	3026-3029
Number of pages	4
Journal	Optics Letters
Volume	39
Issue number	10
Early online date	14 May 2014
DOIs	https://doi.org/10.1364/OL.39.003026
Publication status	Published - 15 May 2014

Bibliographical note

© 2014 Optical Society of America
This paper was published in Optics letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-10-3026. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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10.1364/OL.39.003026

Humidity responsivity of poly(methyl methacrylate)based
© 2014 Optical Society of America This paper was published in Optics letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-10-3026. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-10-3026

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title = "Humidity responsivity of poly(methyl methacrylate)-based optical fiber Bragg grating sensors",

abstract = "The humidity response of poly(methyl methacrylate) (PMMA)-based optical fiber Bragg gratings (POFBGs) has been studied. The characteristic wavelength of the grating is modulated by water absorption-induced swelling and refractive index change in the fiber. This work indicates that anisotropic expansion may exist in PMMA optical fiber, reducing the humidity responsivity of the grating and introducing uncertainty in the responsivity from fiber to fiber. By pre-straining a grating, one can get rid of this uncertainty and simultaneously improve the POFBG response time.",

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Humidity responsivity of poly(methyl methacrylate)-based optical fiber Bragg grating sensors

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