Fiber optic evanescent field sensors for pH monitoring in civil infrastructure

Masoud Ghandehari; Cristian S. Vimer

doi:10.1117/12.470729

Fiber optic evanescent field sensors for pH monitoring in civil infrastructure

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Fiber optic pH sensors based on the evanescent field spectroscopic technique is studied. Portions of poly (-methyl methacrylate) (PMMA) cladding of plastic clad silica (PCS) optical fibers are replaced with new cladding composed of PMMA doped with a pH sensitive chromophore. Methyl Red, Thymol Blue, Thymolphtalein are used for sensing pH at the acid, neutral and base levels. Changes in the pH of the analyte are detected by measuring the absorption spectrum of the new cladding in the sensing region of the optical fiber.

Original language	English (US)
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Editors	A.L. Gyekenyesi, S.M. Shepard, D.R. Huston, A.E. Aktan, P.J. Shull
Pages	196-205
Number of pages	10
Volume	4704
DOIs	https://doi.org/10.1117/12.470729
State	Published - 2002
Event	Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures - Newport Beach, CA, United States Duration: Mar 18 2002 → Mar 19 2002

Other

Other	Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures
Country/Territory	United States
City	Newport Beach, CA
Period	3/18/02 → 3/19/02

ASJC Scopus subject areas

Electrical and Electronic Engineering
Condensed Matter Physics

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10.1117/12.470729

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Fiber optic evanescent field sensors for pH monitoring in civil infrastructure. / Ghandehari, Masoud; Vimer, Cristian S.
Proceedings of SPIE - The International Society for Optical Engineering. ed. / A.L. Gyekenyesi; S.M. Shepard; D.R. Huston; A.E. Aktan; P.J. Shull. Vol. 4704 2002. p. 196-205.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ghandehari, M & Vimer, CS 2002, Fiber optic evanescent field sensors for pH monitoring in civil infrastructure. in AL Gyekenyesi, SM Shepard, DR Huston, AE Aktan & PJ Shull (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4704, pp. 196-205, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures, Newport Beach, CA, United States, 3/18/02. https://doi.org/10.1117/12.470729

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abstract = "Fiber optic pH sensors based on the evanescent field spectroscopic technique is studied. Portions of poly (-methyl methacrylate) (PMMA) cladding of plastic clad silica (PCS) optical fibers are replaced with new cladding composed of PMMA doped with a pH sensitive chromophore. Methyl Red, Thymol Blue, Thymolphtalein are used for sensing pH at the acid, neutral and base levels. Changes in the pH of the analyte are detected by measuring the absorption spectrum of the new cladding in the sensing region of the optical fiber.",

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Fiber optic evanescent field sensors for pH monitoring in civil infrastructure

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