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Proceedings Paper

Optical sensors based on palladium and polymer-coated optical fiber resonators
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Paper Abstract

In this work, we present robust and easy-to-fabricate optical gas and vapor sensors based on optical fiber resonators (OFR) coated with palladium (Pd) thin films, Pd micro-particles and polymer brushes (PB). Pd based sensors are used for hydrogen (H2) gas detection in concentration range of 0% to 1% and polymer brush-coated OFR are used for detection of vapor in concentration range of 0 to 25%. Sensing mechanism of these sensors is based on spectral shift of resonance wavelength which are called whispering gallery modes (WGMs). This spectral shift is due to volume expansion of the sensing material. Tapered fiber is used in order to excite WGMs in coated OFRs. Good sensitivity and repeatability results are obtained for all three types of sensors.

Paper Details

Date Published: 11 April 2019
PDF: 6 pages
Proc. SPIE 11028, Optical Sensors 2019, 1102831 (11 April 2019); doi: 10.1117/12.2524939
Show Author Affiliations
N. Bavili, Koç Univ. (Turkey)
M. Eryürek, TÜBİTAK BİLGEM (Turkey)
B. Morova, Koç Univ. (Turkey)
I. Yılgor, Koç Univ. (Turkey)
E. Yılgor, Koç Univ. (Turkey)
A. Kiraz, Koç Univ. (Turkey)

Published in SPIE Proceedings Vol. 11028:
Optical Sensors 2019
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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