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11 April 2019 Optical sensors based on palladium and polymer-coated optical fiber resonators
N. Bavili, M. Eryürek, B. Morova, I. Yılgor, E. Yılgor, A. Kiraz
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Proceedings Volume 11028, Optical Sensors 2019; 1102831 (2019) https://doi.org/10.1117/12.2524939
Event: SPIE Optics + Optoelectronics, 2019, Prague, Czech Republic
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.
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N. Bavili, M. Eryürek, B. Morova, I. Yılgor, E. Yılgor, and A. Kiraz "Optical sensors based on palladium and polymer-coated optical fiber resonators", Proc. SPIE 11028, Optical Sensors 2019, 1102831 (11 April 2019); https://doi.org/10.1117/12.2524939
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KEYWORDS
Palladium
Sensors
Resonators
Polymers
Hydrogen
Optical fibers
Optical sensors
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