Optical fiber sensor for biofilm measurement using intensity modulation and image analysis

R. Philip-Chandy; Patricia J. Scully; Piers Eldridge; H. J. Kadim; M. Gérard Grapin; M. Guy Jonca; M. Gérard D'Ambrosio; Francois Colin

doi:10.1109/2944.892616

Optical fiber sensor for biofilm measurement using intensity modulation and image analysis

R. Philip-Chandy
, Patricia J. Scully
, Piers Eldridge
, H. J. Kadim
, M. Gérard Grapin
, M. Guy Jonca
, M. Gérard D'Ambrosio
, Francois Colin

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

99 Citations (Scopus)

Abstract

The development of an online sensor to determine the fouling properties of aqueous process fluids is described. A plastic optical fiber with its cladding removed over a sensitized length measures the growth of biofilms in a closed loop water process system by evanescent field attenuation and intensity modulation. The sensor detects material build-up at the core-cladding interface by means of refractive index modulation. A theoretical model is developed showing that an increase in cladding refractive index reduces the intensity of light propagating in the fiber and attenuates the high order modes. The modulation mechanism of the sensor is demonstrated using a CCD camera and frame grabber to record the far field modal distribution of the fiber, when the outer modes are excited. The intensity distribution changes spatially in response to the biofilm deposit on the sensor, indicating evanescent field attenuation.

Original language	English
Pages (from-to)	764-772
Number of pages	9
Journal	IEEE Journal on Selected Topics in Quantum Electronics
Volume	6
Issue number	5
DOIs	https://doi.org/10.1109/2944.892616
Publication status	Published - Sep 2000
Externally published	Yes

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10.1109/2944.892616

Cite this

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title = "Optical fiber sensor for biofilm measurement using intensity modulation and image analysis",

abstract = "The development of an online sensor to determine the fouling properties of aqueous process fluids is described. A plastic optical fiber with its cladding removed over a sensitized length measures the growth of biofilms in a closed loop water process system by evanescent field attenuation and intensity modulation. The sensor detects material build-up at the core-cladding interface by means of refractive index modulation. A theoretical model is developed showing that an increase in cladding refractive index reduces the intensity of light propagating in the fiber and attenuates the high order modes. The modulation mechanism of the sensor is demonstrated using a CCD camera and frame grabber to record the far field modal distribution of the fiber, when the outer modes are excited. The intensity distribution changes spatially in response to the biofilm deposit on the sensor, indicating evanescent field attenuation.",

author = "R. Philip-Chandy and Scully, \{Patricia J.\} and Piers Eldridge and Kadim, \{H. J.\} and Grapin, \{M. G{\'e}rard\} and Jonca, \{M. Guy\} and D'Ambrosio, \{M. G{\'e}rard\} and Francois Colin",

year = "2000",

month = sep,

doi = "10.1109/2944.892616",

language = "English",

volume = "6",

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TY - JOUR

T1 - Optical fiber sensor for biofilm measurement using intensity modulation and image analysis

AU - Philip-Chandy, R.

AU - Scully, Patricia J.

AU - Eldridge, Piers

AU - Kadim, H. J.

AU - Grapin, M. Gérard

AU - Jonca, M. Guy

AU - D'Ambrosio, M. Gérard

AU - Colin, Francois

PY - 2000/9

Y1 - 2000/9

N2 - The development of an online sensor to determine the fouling properties of aqueous process fluids is described. A plastic optical fiber with its cladding removed over a sensitized length measures the growth of biofilms in a closed loop water process system by evanescent field attenuation and intensity modulation. The sensor detects material build-up at the core-cladding interface by means of refractive index modulation. A theoretical model is developed showing that an increase in cladding refractive index reduces the intensity of light propagating in the fiber and attenuates the high order modes. The modulation mechanism of the sensor is demonstrated using a CCD camera and frame grabber to record the far field modal distribution of the fiber, when the outer modes are excited. The intensity distribution changes spatially in response to the biofilm deposit on the sensor, indicating evanescent field attenuation.

AB - The development of an online sensor to determine the fouling properties of aqueous process fluids is described. A plastic optical fiber with its cladding removed over a sensitized length measures the growth of biofilms in a closed loop water process system by evanescent field attenuation and intensity modulation. The sensor detects material build-up at the core-cladding interface by means of refractive index modulation. A theoretical model is developed showing that an increase in cladding refractive index reduces the intensity of light propagating in the fiber and attenuates the high order modes. The modulation mechanism of the sensor is demonstrated using a CCD camera and frame grabber to record the far field modal distribution of the fiber, when the outer modes are excited. The intensity distribution changes spatially in response to the biofilm deposit on the sensor, indicating evanescent field attenuation.

UR - https://www.scopus.com/pages/publications/0034262041

U2 - 10.1109/2944.892616

DO - 10.1109/2944.892616

M3 - Article

SN - 1077-260X

VL - 6

SP - 764

EP - 772

JO - IEEE Journal on Selected Topics in Quantum Electronics

JF - IEEE Journal on Selected Topics in Quantum Electronics

IS - 5

ER -

Optical fiber sensor for biofilm measurement using intensity modulation and image analysis

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