Distributed plastic optical fibre measurement of pH using a photon counting OTDR

C. Saunders; P. J. Scully

doi:10.1088/1742-6596/15/1/011

Distributed plastic optical fibre measurement of pH using a photon counting OTDR

C. Saunders
, P. J. Scully

Research output: Chapter in Book/Conference proceeding › Conference contribution › peer-review

Abstract

Distributed measurement of pH was demonstrated at a sensitised region 4m from the distal end of a 20m length of plastic optical fibre. The cladding was removed from the fibre over 150mm and the bare core was exposed to an aqueous solution of methyl red at three values of pH, between 2.89 and 9.70. The optical fibre was interrogated at 648nm using a Luciol photon counting optical time domain reflectometer, and demonstrated that the sensing region was attenuated as a function of pH. The attenuation varied from 16.3 dB at pH 2.89 to 8.6 dB at pH 9.70; this range equated to -1.13 ± 0.04 dB/pH. It is thus possible to determine both the position to ± 12mm and pH to an estimated ± 0.5pH at the sensing region. © 2005 IOP Publishing Ltd.

Original language	English
Title of host publication	Journal of Physics: Conference Series\|J. Phys. Conf. Ser.
Publisher	IOP Publishing Ltd
Pages	61-66
Number of pages	5
Volume	15
DOIs	https://doi.org/10.1088/1742-6596/15/1/011
Publication status	Published - 1 Jan 2005
Event	13th Conference on Sensors and Their Applications - Greenwich University Duration: 6 Sept 2005 → 8 Sept 2005

Conference

Conference	13th Conference on Sensors and Their Applications
City	Greenwich University
Period	6/09/05 → 8/09/05

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10.1088/1742-6596/15/1/011

Cite this

@inproceedings{f81eaa762f4e4fe3970412316602e1a3,

title = "Distributed plastic optical fibre measurement of pH using a photon counting OTDR",

abstract = "Distributed measurement of pH was demonstrated at a sensitised region 4m from the distal end of a 20m length of plastic optical fibre. The cladding was removed from the fibre over 150mm and the bare core was exposed to an aqueous solution of methyl red at three values of pH, between 2.89 and 9.70. The optical fibre was interrogated at 648nm using a Luciol photon counting optical time domain reflectometer, and demonstrated that the sensing region was attenuated as a function of pH. The attenuation varied from 16.3 dB at pH 2.89 to 8.6 dB at pH 9.70; this range equated to -1.13 ± 0.04 dB/pH. It is thus possible to determine both the position to ± 12mm and pH to an estimated ± 0.5pH at the sensing region. {\textcopyright} 2005 IOP Publishing Ltd.",

author = "C. Saunders and Scully, \{P. J.\}",

year = "2005",

month = jan,

day = "1",

doi = "10.1088/1742-6596/15/1/011",

language = "English",

volume = "15",

pages = "61--66",

booktitle = "Journal of Physics: Conference Series|J. Phys. Conf. Ser.",

publisher = "IOP Publishing Ltd",

address = "United Kingdom",

note = "13th Conference on Sensors and Their Applications ; Conference date: 06-09-2005 Through 08-09-2005",

}

TY - GEN

T1 - Distributed plastic optical fibre measurement of pH using a photon counting OTDR

AU - Saunders, C.

AU - Scully, P. J.

PY - 2005/1/1

Y1 - 2005/1/1

N2 - Distributed measurement of pH was demonstrated at a sensitised region 4m from the distal end of a 20m length of plastic optical fibre. The cladding was removed from the fibre over 150mm and the bare core was exposed to an aqueous solution of methyl red at three values of pH, between 2.89 and 9.70. The optical fibre was interrogated at 648nm using a Luciol photon counting optical time domain reflectometer, and demonstrated that the sensing region was attenuated as a function of pH. The attenuation varied from 16.3 dB at pH 2.89 to 8.6 dB at pH 9.70; this range equated to -1.13 ± 0.04 dB/pH. It is thus possible to determine both the position to ± 12mm and pH to an estimated ± 0.5pH at the sensing region. © 2005 IOP Publishing Ltd.

AB - Distributed measurement of pH was demonstrated at a sensitised region 4m from the distal end of a 20m length of plastic optical fibre. The cladding was removed from the fibre over 150mm and the bare core was exposed to an aqueous solution of methyl red at three values of pH, between 2.89 and 9.70. The optical fibre was interrogated at 648nm using a Luciol photon counting optical time domain reflectometer, and demonstrated that the sensing region was attenuated as a function of pH. The attenuation varied from 16.3 dB at pH 2.89 to 8.6 dB at pH 9.70; this range equated to -1.13 ± 0.04 dB/pH. It is thus possible to determine both the position to ± 12mm and pH to an estimated ± 0.5pH at the sensing region. © 2005 IOP Publishing Ltd.

U2 - 10.1088/1742-6596/15/1/011

DO - 10.1088/1742-6596/15/1/011

M3 - Conference contribution

VL - 15

SP - 61

EP - 66

BT - Journal of Physics: Conference Series|J. Phys. Conf. Ser.

PB - IOP Publishing Ltd

T2 - 13th Conference on Sensors and Their Applications

Y2 - 6 September 2005 through 8 September 2005

ER -

Distributed plastic optical fibre measurement of pH using a photon counting OTDR

Abstract

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