Detection of organic aromatic compounds in paraffin by a long-period fiber grating optical sensor with optimized sensitivity

Thomas D.P. Allsop; Lin Zhang; Ian Bennion

doi:10.1016/S0030-4018(01)01131-2

Detection of organic aromatic compounds in paraffin by a long-period fiber grating optical sensor with optimized sensitivity

Thomas D.P. Allsop^*, Lin Zhang, Ian Bennion

^*Corresponding author for this work

Aston Institute of Photonic Technologies (AiPT)

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

Abstract

A long-period grating (LPG) sensor is used to detect small variations in the concentration of an organic aromatic compound (xylene) in a paraffin (heptane) solution. A new design procedure is adopted and demonstrated to maximize the sensitivity of LPG (wavelength shift for a change in the surrounding refractive index, (dλ/dn₃)) for a given application. The detection method adopted is comparable to the standard technique used in industry (high performance liquid chromatograph and UV spectroscopy) which has a relative accuracy between ∼±0.5% and 5%. The minimum detectable change in volumetric concentration is 0.04% in a binary fluid with the detection system presented. This change of concentration relates to a change in refractive index of Δn ∼ 6 × 10^-5. © 2001 Elsevier Science B.V.

Original language	English
Pages (from-to)	181-190
Number of pages	10
Journal	Optics Communications
Volume	191
Issue number	3-6
Early online date	1 May 2001
DOIs	https://doi.org/10.1016/S0030-4018(01)01131-2
Publication status	Published - 8 May 2001

Keywords

long-period fiber grating
chemical sensing
mode coupling

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10.1016/S0030-4018(01)01131-2

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title = "Detection of organic aromatic compounds in paraffin by a long-period fiber grating optical sensor with optimized sensitivity",

abstract = "A long-period grating (LPG) sensor is used to detect small variations in the concentration of an organic aromatic compound (xylene) in a paraffin (heptane) solution. A new design procedure is adopted and demonstrated to maximize the sensitivity of LPG (wavelength shift for a change in the surrounding refractive index, (dλ/dn3)) for a given application. The detection method adopted is comparable to the standard technique used in industry (high performance liquid chromatograph and UV spectroscopy) which has a relative accuracy between ∼±0.5% and 5%. The minimum detectable change in volumetric concentration is 0.04% in a binary fluid with the detection system presented. This change of concentration relates to a change in refractive index of Δn ∼ 6 × 10-5. {\textcopyright} 2001 Elsevier Science B.V.",

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T1 - Detection of organic aromatic compounds in paraffin by a long-period fiber grating optical sensor with optimized sensitivity

AU - Allsop, Thomas D.P.

AU - Zhang, Lin

AU - Bennion, Ian

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N2 - A long-period grating (LPG) sensor is used to detect small variations in the concentration of an organic aromatic compound (xylene) in a paraffin (heptane) solution. A new design procedure is adopted and demonstrated to maximize the sensitivity of LPG (wavelength shift for a change in the surrounding refractive index, (dλ/dn3)) for a given application. The detection method adopted is comparable to the standard technique used in industry (high performance liquid chromatograph and UV spectroscopy) which has a relative accuracy between ∼±0.5% and 5%. The minimum detectable change in volumetric concentration is 0.04% in a binary fluid with the detection system presented. This change of concentration relates to a change in refractive index of Δn ∼ 6 × 10-5. © 2001 Elsevier Science B.V.

AB - A long-period grating (LPG) sensor is used to detect small variations in the concentration of an organic aromatic compound (xylene) in a paraffin (heptane) solution. A new design procedure is adopted and demonstrated to maximize the sensitivity of LPG (wavelength shift for a change in the surrounding refractive index, (dλ/dn3)) for a given application. The detection method adopted is comparable to the standard technique used in industry (high performance liquid chromatograph and UV spectroscopy) which has a relative accuracy between ∼±0.5% and 5%. The minimum detectable change in volumetric concentration is 0.04% in a binary fluid with the detection system presented. This change of concentration relates to a change in refractive index of Δn ∼ 6 × 10-5. © 2001 Elsevier Science B.V.

KW - long-period fiber grating

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KW - mode coupling

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DO - 10.1016/S0030-4018(01)01131-2

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JO - Optics Communications

JF - Optics Communications

IS - 3-6

ER -

Detection of organic aromatic compounds in paraffin by a long-period fiber grating optical sensor with optimized sensitivity

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Keywords

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