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Proceedings Paper

Fabrication of D-type fiber optic sensors with a long interaction length and studying effects of critical parameters on sensor response
Author(s): Burcu Guleryuz; Caner Durucan; Mustafa M. Aslan
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Paper Abstract

Today evanescent wave based fiber optic (F/O) platforms are in favor of the use for monitoring molecular interactions since they are practical, economic and easy to operate which make them ideal turnkey systems for clinical, pharmaceutical, environmental and security applications. The side polishing is one of techniques for reshaping the geometry of the waveguide to make the F/O sensor more sensitive to surrounding refractive index (RI) in evanescent field. In this study D-type F/O sensors with a 25 mm-long interaction lengths are fabricated. In addition to that, effects of the critical parameters such as the polishing depth, the wavelength, and the temperature on the sensor response are determined for the RI in the range of 1.33 - 1.47. The developing key of these F/O sensors is reaching high strength and penetration depth of evanescent wave in varying RI of the surrounding bio-layer. Development steps of D-type F/O sensors are; fabrication of supporting elements - silicon V channels, F/O cable preparation, adhesion, lapping and polishing, fusing the FC connectors, construction of the optical system, and RI measurements. Details of these steps are explained and the general characteristics of the D-type F/O sensor are presented. Results indicate that the sensor’s responses in three different RI ranges can be improved by the polishing depth. A maximum sensitivity of around 2x105 for the D-type F/O sensors is demonstrated in the RI range of 1.44-1.46.

Paper Details

Date Published: 22 May 2014
PDF: 10 pages
Proc. SPIE 9106, Advanced Environmental, Chemical, and Biological Sensing Technologies XI, 91060J (22 May 2014); doi: 10.1117/12.2053246
Show Author Affiliations
Burcu Guleryuz, TUBITAK Marmara Research Ctr. (Turkey)
Caner Durucan, Middle East Technical Univ. (Turkey)
Mustafa M. Aslan, TUBITAK Marmara Research Ctr. (Turkey)

Published in SPIE Proceedings Vol. 9106:
Advanced Environmental, Chemical, and Biological Sensing Technologies XI
Tuan Vo-Dinh; Robert A. Lieberman; Günter G. Gauglitz, Editor(s)

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