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  • Vol. 13, Iss. 5 — May. 1, 1988
  • pp: 407–409

Porous optical fibers for high-sensitivity ammonia-vapor sensors

M. R. Shahriari, Q. Zhou, and G. H. Sigel, Jr.  »View Author Affiliations


Optics Letters, Vol. 13, Issue 5, pp. 407-409 (1988)
http://dx.doi.org/10.1364/OL.13.000407


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Abstract

A new porous glass optical fiber has been developed for use as a sensor for the detection of ammonia vapors at low concentrations. The porous structure that remains after selective heat treatment, phase separation, and chemical leaching of a borosilicate glass imparts a high surface area to the fiber core. Ammonia vapors permeating into the porous zone, which is pretreated with a reversible pH dye indicator, produce a spectral change in transmission. The resulting pH change is measured by in-line optical absorbance and is proportional to the ambient-ammonia concentration. Ammonia-vapor concentrations as low as 0.7 part in 106 have been detected.

© 1988 Optical Society of America

History
Original Manuscript: July 16, 1987
Manuscript Accepted: February 2, 1988
Published: May 1, 1988

Citation
M. R. Shahriari, Q. Zhou, and G. H. Sigel, "Porous optical fibers for high-sensitivity ammonia-vapor sensors," Opt. Lett. 13, 407-409 (1988)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-13-5-407


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References

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