An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating

Wei Zhang; David J. Webb; Gang-Ding Peng

doi:10.1117/12.922279

An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating

Wei Zhang
, David J. Webb
, Gang-Ding Peng

University of New South Wales, Australia

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

149 Downloads (Pure)

Abstract

A new type of fibre-optic biochemical concentration sensor based on a polymer optical fibre Bragg grating (POFBG) is proposed. The wavelength of the POFBG varies as a function of analyte concentration. The feasibility of this sensing concept is demonstrated by a saline concentration sensor. When polymer fibre is placed in a water based solution the process of osmosis takes place in this water-fibre system. An osmotic pressure which is proportional to the solution concentration, will apply to the fibre in addition to the hydraulic pressure. It tends to drive the water content out of the fibre and into the surrounding solution. When the surrounding solution concentration increases the osmotic pressure increases to drive the water content out of the fibre, consequently increasing the differential hydraulic pressure and reducing the POFBG wavelength. This process will stop once there is a balance between the osmotic pressure and the differential hydraulic pressure. Similarly when the solution concentration decreases the osmotic pressure decreases, leading to a dominant differential hydraulic pressure which drives the water into the fibre till a new pressure balance is established. Therefore the water content in the polymer fibre - and consequently the POFBG wavelength - depends directly on the solution concentration. A POFBG wavelength change of 0.9 nm was measured for saline concentration varying from 0 to 22%. For a wavelength interrogation system with a resolution of 1 pm, a measurement of solution concentration of 0.03% can be expected.

Original language	English
Title of host publication	Micro-structured and specialty optical fibres
Editors	Kyriacos Kalli, Alexis Mendez
Publisher	Society of Photo-Optical Instrumentation Engineers (SPIE)
Number of pages	6
Volume	8426
DOIs	https://doi.org/10.1117/12.922279
Publication status	Published - 2012
Event	Microstructured and specialty optical fibres - Brussels, Belgium Duration: 17 Apr 2012 → 19 Apr 2012

Publication series

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

Conference

Conference	Microstructured and specialty optical fibres
Country/Territory	Belgium
City	Brussels
Period	17/04/12 → 19/04/12

Bibliographical note

Zhang, Wei; Webb, David J.; Peng, Gang-Ding. An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating. In: Micro-structured and specialty optical fibres. ed. Kyriacos Kalli; Alexis Mendez. Vol. 8426 SPIE, 2012.

Copyright 2012 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic 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.

Keywords

Fibre Bragg grating
osmosis process
solution concentration
polymer swelling
PMMA

Access to Document

10.1117/12.922279

An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating
Zhang, Wei; Webb, David J.; Peng, Gang-Ding. An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating. In: Micro-structured and specialty optical fibres. ed. Kyriacos Kalli; Alexis Mendez. Vol. 8426 SPIE, 2012. Copyright 2012 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic 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.
Final published version, 288 KB

Cite this

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title = "An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating",

abstract = "A new type of fibre-optic biochemical concentration sensor based on a polymer optical fibre Bragg grating (POFBG) is proposed. The wavelength of the POFBG varies as a function of analyte concentration. The feasibility of this sensing concept is demonstrated by a saline concentration sensor. When polymer fibre is placed in a water based solution the process of osmosis takes place in this water-fibre system. An osmotic pressure which is proportional to the solution concentration, will apply to the fibre in addition to the hydraulic pressure. It tends to drive the water content out of the fibre and into the surrounding solution. When the surrounding solution concentration increases the osmotic pressure increases to drive the water content out of the fibre, consequently increasing the differential hydraulic pressure and reducing the POFBG wavelength. This process will stop once there is a balance between the osmotic pressure and the differential hydraulic pressure. Similarly when the solution concentration decreases the osmotic pressure decreases, leading to a dominant differential hydraulic pressure which drives the water into the fibre till a new pressure balance is established. Therefore the water content in the polymer fibre - and consequently the POFBG wavelength - depends directly on the solution concentration. A POFBG wavelength change of 0.9 nm was measured for saline concentration varying from 0 to 22\%. For a wavelength interrogation system with a resolution of 1 pm, a measurement of solution concentration of 0.03\% can be expected.",

keywords = "Fibre Bragg grating, osmosis process, solution concentration, polymer swelling, PMMA",

author = "Wei Zhang and Webb, \{David J.\} and Gang-Ding Peng",

note = "Zhang, Wei; Webb, David J.; Peng, Gang-Ding. An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating. In: Micro-structured and specialty optical fibres. ed. Kyriacos Kalli; Alexis Mendez. Vol. 8426 SPIE, 2012. Copyright 2012 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic 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.; Microstructured and specialty optical fibres ; Conference date: 17-04-2012 Through 19-04-2012",

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Zhang, W, Webb, DJ & Peng, G-D 2012, An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating. in K Kalli & A Mendez (eds), Micro-structured and specialty optical fibres. vol. 8426, SPIE proceedings, Society of Photo-Optical Instrumentation Engineers (SPIE), Microstructured and specialty optical fibres, Brussels, Belgium, 17/04/12. https://doi.org/10.1117/12.922279

An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating. / Zhang, Wei; Webb, David J.; Peng, Gang-Ding.
Micro-structured and specialty optical fibres. ed. / Kyriacos Kalli; Alexis Mendez. Vol. 8426 Society of Photo-Optical Instrumentation Engineers (SPIE), 2012. (SPIE proceedings).

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

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N2 - A new type of fibre-optic biochemical concentration sensor based on a polymer optical fibre Bragg grating (POFBG) is proposed. The wavelength of the POFBG varies as a function of analyte concentration. The feasibility of this sensing concept is demonstrated by a saline concentration sensor. When polymer fibre is placed in a water based solution the process of osmosis takes place in this water-fibre system. An osmotic pressure which is proportional to the solution concentration, will apply to the fibre in addition to the hydraulic pressure. It tends to drive the water content out of the fibre and into the surrounding solution. When the surrounding solution concentration increases the osmotic pressure increases to drive the water content out of the fibre, consequently increasing the differential hydraulic pressure and reducing the POFBG wavelength. This process will stop once there is a balance between the osmotic pressure and the differential hydraulic pressure. Similarly when the solution concentration decreases the osmotic pressure decreases, leading to a dominant differential hydraulic pressure which drives the water into the fibre till a new pressure balance is established. Therefore the water content in the polymer fibre - and consequently the POFBG wavelength - depends directly on the solution concentration. A POFBG wavelength change of 0.9 nm was measured for saline concentration varying from 0 to 22%. For a wavelength interrogation system with a resolution of 1 pm, a measurement of solution concentration of 0.03% can be expected.

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KW - Fibre Bragg grating

KW - osmosis process

KW - solution concentration

KW - polymer swelling

KW - PMMA

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VL - 8426

T3 - SPIE proceedings

BT - Micro-structured and specialty optical fibres

A2 - Kalli, Kyriacos

A2 - Mendez, Alexis

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

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Y2 - 17 April 2012 through 19 April 2012

ER -

An intrinsic biochemical concentration sensor using a polymer optical fibre Bragg grating

Abstract

Publication series

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Bibliographical note

Keywords

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