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Optics Letters

Optics Letters


  • Vol. 20, Iss. 1 — Jan. 1, 1995
  • pp: 103–105

Distributed sensor for water and pH measurements using fiber optics and swellable polymeric systems

W. C. Michie, B. Culshaw, I. McKenzie, M. Konstantakis, N. B. Graham, C. Moran, F. Santos, E. Bergqvist, and B. Carlstrom  »View Author Affiliations

Optics Letters, Vol. 20, Issue 1, pp. 103-105 (1995)

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We report on the design, construction and test of a generic form of sensor for making distributed measurements of a range of chemical parameters. The technique combines optical time-domain reflectometry with chemically sensitive water-swellable polymers (hydrogels). Initial experiments have concentrated on demonstrating a distributed water detector; however, gels have been developed that enable this sensor to be readily adapted to distributed pH measurements.

© 1995 Optical Society of America

Original Manuscript: September 2, 1994
Published: January 1, 1995

W. C. Michie, N. B. Graham, F. Santos, E. Bergqvist, B. Carlstrom, C. Moran, B. Culshaw, I. McKenzie, and M. Konstantakis, "Distributed sensor for water and pH measurements using fiber optics and swellable polymeric systems," Opt. Lett. 20, 103-105 (1995)

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  1. Product Data, Optoelectronics, Inc., Unit 9, 2538 Speers Road, Oakville, Ontario, Canada.
  2. N. A. Peppas, Polymers, Vol. II of Hydrogels in Medicine and Pharmacy (CRC, Boca Raton, Fla., 1987).
  3. R. Griffiths, G. W. Nelson, Proc. Soc. Photo-Opt. Instrum. Eng. 985, 12 (1988).
  4. J. N. Fields, Appl. Phys. Lett. 36, 799 (1979). [CrossRef]
  5. W. C. Michie, B. Culshaw, N. B. Graham, C. Moran, P. T. Gardiner, UK patent application PCT/GB94/00202.
  6. C. Moran, N. B. Graham, “Random block copolymers,” UK patent application 9306887.2.

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