26 April 2006 AFM investigation of sol-gel layers for optical fibre sensors
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Proceedings Volume 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV; 61592A (2006); doi: 10.1117/12.674823
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 2005, Wilga, Poland
Abstract
In this paper a project of a simple optical fibre ultraviolet sensor was presented. As the main part of the sensor, the active layer containing an organic dye able to absorb ultraviolet radiation and afterwards emit radiation in a visible range underwent the detailed investigation. The Atomic Force Microscopy (AFM) images of the gel active layers clearly proved a relation between the surface structure, time of sol's hydrolysis and the compositions of the sols which differed with the molar ratio of three alkoxysilanes (TEOS- tetraethoxysilane, MTES- methyltriethoxysilane and PhTES- phenyltriethoxysilane). The experiment was being carried out during 42 days with the measurements every 7th day. Additionaly, a dependence between the structure of the examined surface (which means also a dependence of both remaining factors mentioned above) and emission's intensity of the sensor while excitated with a banknote-control UV standard lamp has been noticed. The obtained results give an obvious prove the optical properties of UV optical fibres' sensor in which a gel active layer is applied depend on many different factors, which adequately matched may result in a big sensitivity and efficiency of such a sensor.
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Eliza Chodkowska, Jan Rayss, "AFM investigation of sol-gel layers for optical fibre sensors", Proc. SPIE 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 61592A (26 April 2006); doi: 10.1117/12.674823; https://doi.org/10.1117/12.674823
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KEYWORDS
Sensors

Optical fibers

Atomic force microscopy

Ultraviolet radiation

Refractive index

Lamps

Sol-gels

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