Modification of the sensitivity and selectivity of thin porous layers coated by the sol-gel method on silica optical fibers to gases

Vlastimil Matejec; Daniela Berkova; Miroslav Chomat; Gabriela Kuncova

doi:10.1117/12.373606

29 December 1999 Modification of the sensitivity and selectivity of thin porous layers coated by the sol-gel method on silica optical fibers to gases

Vlastimil Matejec, Daniela Berkova, Miroslav Chomat, Gabriela Kuncova

Author Affiliations +

Proceedings Volume 4016, Photonics, Devices, and Systems; (1999) https://doi.org/10.1117/12.373606
Event: Photonics Prague '99, 1999, Prague, Czech Republic

Abstract

It has been found that thin layers of aerogels applied by the sol-gel method on silica optical fibers change their optical properties due to the interaction with gases such as hydrocarbons. This paper deals with modification of the sensitivity and selectivity to vapors of hydrocarbons and chlorinated hydrocarbons of siloxane aerogel layers based on their doping with TiOTi chains and/or immobilizing in them Cu-ephedrine and Cu-phthalocyanine. The sensing fibers were prepared by the sol-gel application of porous siloxane and doped-siloxane layers on bare cores of PCS fibers. By using the excitation of the fiber with inclined laser beams it is experimentally shown that there are positive or negative changes of the output optical power from the fibers due to bringing the prepared layers into contact with vapors of aliphatic, aromatic and chlorinated hydrocarbons in nitrogen. These effects may be related to a difference between the refractive index of the layer and refractive index of liquid hydrocarbon or hydrocarbon its derivative. It is shown experimentally that doping porous siloxane layers with copper complexes changes their refractive index and optical losses changing thus their sensitivity and selectivity to hydrocarbons and hydrocarbon derivatives.

Citation Download Citation

Vlastimil Matejec, Daniela Berkova, Miroslav Chomat, and Gabriela Kuncova "Modification of the sensitivity and selectivity of thin porous layers coated by the sol-gel method on silica optical fibers to gases", Proc. SPIE 4016, Photonics, Devices, and Systems, (29 December 1999); https://doi.org/10.1117/12.373606

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available