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Proceedings Paper

Refractometric sensor based on all-fiber coaxial Michelson interferometers
Author(s): Paola Barrios; David Sáez-Rodríguez; Amparo Rodríguez; José L. Cruz; Antonio Díez; Miguel V. Andrés
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Paper Abstract

All-fiber coaxial Michelson interferometers are compact and very stable interferometers that can be dipped directly into water solutions for chemical and biological sensing. The sensitivity of the cladding mode to the surrounding medium can be exploited to use the interferometer as a compact fiber refractometer. Several interferometers have been fabricated and characterized as glucose sensors. A first series of devices were designed to work at 1550 nm, while a second series was prepared to work at 850 nm. Thus, the second series of interferometers enables the use of compact, robust and low cost optical spectrum analyzers. In our present experiments, the length of the fiber that forms the interferometer was within the range 1-10 cm. When the shift of the spectrum maxima were measured as a function of the glucose concentration, a slope of 350 pm/% was achieved. The use of the 850 nm sensor heads as a portable sensor system to monitor sewage treatment plants is shown.

Paper Details

Date Published: 18 May 2009
PDF: 6 pages
Proc. SPIE 7356, Optical Sensors 2009, 735607 (18 May 2009); doi: 10.1117/12.820675
Show Author Affiliations
Paola Barrios, Univ. Autónoma de San Luis Potosí (Mexico)
David Sáez-Rodríguez, Univ. de València (Spain)
Amparo Rodríguez, Univ. Autónoma de San Luis Potosí (Mexico)
José L. Cruz, Univ. de València (Spain)
Antonio Díez, Univ. de València (Spain)
Miguel V. Andrés, Univ. de València (Spain)

Published in SPIE Proceedings Vol. 7356:
Optical Sensors 2009
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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