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Proceedings Paper

Preparation of long-period gratings (LPGs) for biological substances detection
Author(s): Anna Katarzyna Dębowska; Mateusz Śmietana; Ewa Brzozowska; Sabina Górska-Frączak; Wojtek J. Bock; Predrag Mikulic
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Paper Abstract

This work discusses methods of applying biological films on the surface of high-sensitive long-period grating (LPG) in the process of developing optical fiber sensors, which allow for label-free detection. Referred techniques prepare the surface of LPG structure for further coating with layers providing specificity of the sensor system. Presented are two methods of fiber coating, based on self-organizing layers, which were applied on two different LPGs. Short and thermally undemanding method was used on UV-written LPG fiber whilst heat requiring method was applied on LPG written by arc method, with silicon nitride (SiNx) nano-coated surface. Sensitivity of fibers was testes through immersing in liquids of various refractive indexes (RIs) and found to be 925.5 nm/RIU for UV-written and nano-coated arc-written LPGs to be -1115.8 nm/RIU, respectively. Shifts of resonance wavelengths occurring during the processes of coating are presented and discussed. Experiments were performed using simple instruments and in short-term proceedings and can therefore be easily repeated as well as applied to industrial production processes. We confirmed effectiveness of both methods and proved that selected fibers were suitable for use in each of those approaches respectively.

Paper Details

Date Published: 25 July 2013
PDF: 6 pages
Proc. SPIE 8902, Electron Technology Conference 2013, 89021O (25 July 2013); doi: 10.1117/12.2031566
Show Author Affiliations
Anna Katarzyna Dębowska, Warsaw Univ. of Technology (Poland)
Mateusz Śmietana, Warsaw Univ. of Technology (Poland)
Ewa Brzozowska, Institute of Immunology and Experimental Therapy (Poland)
Sabina Górska-Frączak, Institute of Immunology and Experimental Therapy (Poland)
Wojtek J. Bock, Univ. du Québec en Outaouais (Canada)
Predrag Mikulic, Univ. du Québec en Outaouais (Canada)

Published in SPIE Proceedings Vol. 8902:
Electron Technology Conference 2013
Pawel Szczepanski; Ryszard Kisiel; Ryszard S. Romaniuk, Editor(s)

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