Polymer optical fiber grating as water activity sensor

Wei Zhang; David J. Webb

doi:10.1117/12.2054207

Polymer optical fiber grating as water activity sensor

Wei Zhang
, David J. Webb

Research output: Chapter in Book/Published conference output › Conference publication

9 Citations (SciVal)

121 Downloads (Pure)

Abstract

Controlling the water content within a product has long been required in the chemical processing, agriculture, food storage, paper manufacturing, semiconductor, pharmaceutical and fuel industries. The limitations of water content measurement as an indicator of safety and quality are attributed to differences in the strength with which water associates with other components in the product. Water activity indicates how tightly water is "bound," structurally or chemically, in products. Water absorption introduces changes in the volume and refractive index of poly(methyl methacrylate) PMMA. Therefore for a grating made in PMMA based optical fiber, its wavelength is an indicator of water absorption and PMMA thus can be used as a water activity sensor. In this work we have investigated the performance of a PMMA based optical fiber grating as a water activity sensor in sugar solution, saline solution and Jet A-1 aviation fuel. Samples of sugar solution with sugar concentration from 0 to 8%, saline solution with concentration from 0 to 22%, and dried (10ppm), ambient (39ppm) and wet (68ppm) aviation fuels were used in experiments. The corresponding water activities are measured as 1.0 to 0.99 for sugar solution, 1.0 to 0.86 for saline solution, and 0.15, 0.57 and 1.0 for the aviation fuel samples. The water content in the measured samples ranges from 100% (pure water) to 10 ppm (dried aviation fuel). The PMMA based optical fiber grating exhibits good sensitivity and consistent response, and Bragg wavelength shifts as large as 3.4 nm when the sensor is transferred from dry fuel to wet fuel.

Original language	English
Title of host publication	Micro-structured and specialty optical fibres III
Editors	Kyriacos Kalli, Alexis Mendez
Place of Publication	Bellingham, WA (US)
Publisher	Society of Photo-Optical Instrumentation Engineers (SPIE)
Number of pages	6
ISBN (Print)	978-1-62841076-1
DOIs	https://doi.org/10.1117/12.2054207
Publication status	Published - 19 May 2014
Event	Micro-structured and specialty optical fibres III - Brussels, Belgium Duration: 14 Apr 2014 → 15 Apr 2014

Publication series

Name	SPIE proceedings
Publisher	SPIE
Volume	9128
ISSN (Print)	0277-786X

Conference

Conference	Micro-structured and specialty optical fibres III
Country/Territory	Belgium
City	Brussels
Period	14/04/14 → 15/04/14

Bibliographical note

Wei Zhang and David J. Webb, "Polymer optical fiber grating as water activity sensor", Micro-structured and Specialty Optical Fibres III, Kyriacos Kalli; Alexis Mendez, Editors, Proc. SPIE 9128 (2014).

Copyright 2014 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

DOI: http://dx.doi.org/10.1117/12.2054207

Keywords

equilibrium relative humidity
fiber Bragg grating
PMMA
polymer optical fiber
water activity

Access to Document

10.1117/12.2054207

Polymer optical fiber grating as water activity sensor
Wei Zhang and David J. Webb, "Polymer optical fiber grating as water activity sensor", Micro-structured and Specialty Optical Fibres III, Kyriacos Kalli; Alexis Mendez, Editors, Proc. SPIE 9128 (2014). Copyright 2014 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI: http://dx.doi.org/10.1117/12.2054207
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http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1868436

Cite this

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title = "Polymer optical fiber grating as water activity sensor",

abstract = "Controlling the water content within a product has long been required in the chemical processing, agriculture, food storage, paper manufacturing, semiconductor, pharmaceutical and fuel industries. The limitations of water content measurement as an indicator of safety and quality are attributed to differences in the strength with which water associates with other components in the product. Water activity indicates how tightly water is {"}bound,{"} structurally or chemically, in products. Water absorption introduces changes in the volume and refractive index of poly(methyl methacrylate) PMMA. Therefore for a grating made in PMMA based optical fiber, its wavelength is an indicator of water absorption and PMMA thus can be used as a water activity sensor. In this work we have investigated the performance of a PMMA based optical fiber grating as a water activity sensor in sugar solution, saline solution and Jet A-1 aviation fuel. Samples of sugar solution with sugar concentration from 0 to 8\%, saline solution with concentration from 0 to 22\%, and dried (10ppm), ambient (39ppm) and wet (68ppm) aviation fuels were used in experiments. The corresponding water activities are measured as 1.0 to 0.99 for sugar solution, 1.0 to 0.86 for saline solution, and 0.15, 0.57 and 1.0 for the aviation fuel samples. The water content in the measured samples ranges from 100\% (pure water) to 10 ppm (dried aviation fuel). The PMMA based optical fiber grating exhibits good sensitivity and consistent response, and Bragg wavelength shifts as large as 3.4 nm when the sensor is transferred from dry fuel to wet fuel.",

keywords = "equilibrium relative humidity, fiber Bragg grating, PMMA, polymer optical fiber, water activity",

author = "Wei Zhang and Webb, \{David J.\}",

note = "Wei Zhang and David J. Webb, {"}Polymer optical fiber grating as water activity sensor{"}, Micro-structured and Specialty Optical Fibres III, Kyriacos Kalli; Alexis Mendez, Editors, Proc. SPIE 9128 (2014). Copyright 2014 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI: http://dx.doi.org/10.1117/12.2054207; Micro-structured and specialty optical fibres III ; Conference date: 14-04-2014 Through 15-04-2014",

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Zhang, W & Webb, DJ 2014, Polymer optical fiber grating as water activity sensor. in K Kalli & A Mendez (eds), Micro-structured and specialty optical fibres III., 91280F, SPIE proceedings, vol. 9128, Society of Photo-Optical Instrumentation Engineers (SPIE), Bellingham, WA (US), Micro-structured and specialty optical fibres III, Brussels, Belgium, 14/04/14. https://doi.org/10.1117/12.2054207

Polymer optical fiber grating as water activity sensor. / Zhang, Wei; Webb, David J.
Micro-structured and specialty optical fibres III. ed. / Kyriacos Kalli; Alexis Mendez. Bellingham, WA (US): Society of Photo-Optical Instrumentation Engineers (SPIE), 2014. 91280F (SPIE proceedings; Vol. 9128).

Research output: Chapter in Book/Published conference output › Conference publication

TY - GEN

T1 - Polymer optical fiber grating as water activity sensor

AU - Zhang, Wei

AU - Webb, David J.

N1 - Wei Zhang and David J. Webb, "Polymer optical fiber grating as water activity sensor", Micro-structured and Specialty Optical Fibres III, Kyriacos Kalli; Alexis Mendez, Editors, Proc. SPIE 9128 (2014). Copyright 2014 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI: http://dx.doi.org/10.1117/12.2054207

PY - 2014/5/19

Y1 - 2014/5/19

N2 - Controlling the water content within a product has long been required in the chemical processing, agriculture, food storage, paper manufacturing, semiconductor, pharmaceutical and fuel industries. The limitations of water content measurement as an indicator of safety and quality are attributed to differences in the strength with which water associates with other components in the product. Water activity indicates how tightly water is "bound," structurally or chemically, in products. Water absorption introduces changes in the volume and refractive index of poly(methyl methacrylate) PMMA. Therefore for a grating made in PMMA based optical fiber, its wavelength is an indicator of water absorption and PMMA thus can be used as a water activity sensor. In this work we have investigated the performance of a PMMA based optical fiber grating as a water activity sensor in sugar solution, saline solution and Jet A-1 aviation fuel. Samples of sugar solution with sugar concentration from 0 to 8%, saline solution with concentration from 0 to 22%, and dried (10ppm), ambient (39ppm) and wet (68ppm) aviation fuels were used in experiments. The corresponding water activities are measured as 1.0 to 0.99 for sugar solution, 1.0 to 0.86 for saline solution, and 0.15, 0.57 and 1.0 for the aviation fuel samples. The water content in the measured samples ranges from 100% (pure water) to 10 ppm (dried aviation fuel). The PMMA based optical fiber grating exhibits good sensitivity and consistent response, and Bragg wavelength shifts as large as 3.4 nm when the sensor is transferred from dry fuel to wet fuel.

AB - Controlling the water content within a product has long been required in the chemical processing, agriculture, food storage, paper manufacturing, semiconductor, pharmaceutical and fuel industries. The limitations of water content measurement as an indicator of safety and quality are attributed to differences in the strength with which water associates with other components in the product. Water activity indicates how tightly water is "bound," structurally or chemically, in products. Water absorption introduces changes in the volume and refractive index of poly(methyl methacrylate) PMMA. Therefore for a grating made in PMMA based optical fiber, its wavelength is an indicator of water absorption and PMMA thus can be used as a water activity sensor. In this work we have investigated the performance of a PMMA based optical fiber grating as a water activity sensor in sugar solution, saline solution and Jet A-1 aviation fuel. Samples of sugar solution with sugar concentration from 0 to 8%, saline solution with concentration from 0 to 22%, and dried (10ppm), ambient (39ppm) and wet (68ppm) aviation fuels were used in experiments. The corresponding water activities are measured as 1.0 to 0.99 for sugar solution, 1.0 to 0.86 for saline solution, and 0.15, 0.57 and 1.0 for the aviation fuel samples. The water content in the measured samples ranges from 100% (pure water) to 10 ppm (dried aviation fuel). The PMMA based optical fiber grating exhibits good sensitivity and consistent response, and Bragg wavelength shifts as large as 3.4 nm when the sensor is transferred from dry fuel to wet fuel.

KW - equilibrium relative humidity

KW - fiber Bragg grating

KW - PMMA

KW - polymer optical fiber

KW - water activity

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BT - Micro-structured and specialty optical fibres III

A2 - Kalli, Kyriacos

A2 - Mendez, Alexis

PB - Society of Photo-Optical Instrumentation Engineers (SPIE)

CY - Bellingham, WA (US)

T2 - Micro-structured and specialty optical fibres III

Y2 - 14 April 2014 through 15 April 2014

ER -

Polymer optical fiber grating as water activity sensor

Abstract

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Bibliographical note

Keywords

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