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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J Campillo
  • Vol. 32, Iss. 1 — Jan. 1, 2007
  • pp: 29–31

Fiber-optic pH-sensors in long-period fiber gratings using electrostatic self-assembly

Jesus M. Corres, Ignacio del Villar, Ignacio R. Matias, and Francisco J. Arregui  »View Author Affiliations


Optics Letters, Vol. 32, Issue 1, pp. 29-31 (2007)
http://dx.doi.org/10.1364/OL.32.000029


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Abstract

A novel pH sensor based on the deposition of electrostatic self-assembled polyallylamine hydrochloride and polyacrylic acid on the cladding of a long-period fiber grating has been designed. The overlay thickness is of the order of magnitude of the light wavelength used to interrogate the sensor. A theoretical model of multilayer cylindrical waveguides based on coupled-mode theory has been used to predict the position of the attenuation bands as a function of the overlay thickness. A study of the role that pH plays in the thickness of the sensitive overlay was carried out. Experimentally, a wavelength shift of the attenuation bands of up to 85 nm was obtained in the 4–7 range of pH units. The results are reproducible, which indicates the possibilities of a multiple-use sensor.

© 2006 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(160.5470) Materials : Polymers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: August 4, 2006
Revised Manuscript: October 4, 2006
Manuscript Accepted: October 7, 2006
Published: December 13, 2006

Citation
Jesus M. Corres, Ignacio del Villar, Ignacio R. Matias, and Francisco J. Arregui, "Fiber-optic pH-sensors in long-period fiber gratings using electrostatic self-assembly," Opt. Lett. 32, 29-31 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-1-29

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