Please use this identifier to cite or link to this item:
Title: Use of polyethylene glycol coatings for optical fibre humidity sensing
Authors: Açıkgöz, Sabriye
Bilen, Bukem
Demir, Mustafa Muammer
Menceloğlu, Yusuf Z.
Skarlatos, Yani
Aktaş, Gülen
İnci, Mehmet N.
Keywords: Humidity
Plastic fibre
Polyethylene glycol
Publisher: Springer Verlag
Source: Açıkgöz, S., Bilen, B., Demir, M. M., Menceloğlu, Y. Z., Skarlatos, Y., Aktaş, G., and İnci M. N. (2008). Use of polyethylene glycol coatings for optical fibre humidity sensing. Optical Review. 15(2), 84-90. doi:10.1007/s10043-008-0012-1
Abstract: Humidity induced change in the refractive index and thickness of the polyethylene glycol (PEG) coatings are in situ investigated for a range from 10 to 95%, using an optical waveguide spectroscopic technique. It is experimentally demonstrated that, upon humidity change, the optical and swelling characteristics of the PEG coatings can be employed to build a plastic fibre optic humidity sensor. The sensing mechanism is based on the humidity induced change in the refractive index of the PEG film, which is directly coated onto a polished segment of a plastic optical fibre with dip-coating method. It is observed that PEG, which is a highly hydrophilic material, shows no monotonic linear response to humidity but gives different characteristics for various ranges of humidity levels both in index of refraction and in thickness. It undergoes a physical phase change from a semi-crystalline structure to a gel one at around 80% relative humidity. At this phase change point, a drastic decrease occurs in the index of refraction as well as a drastic increase in the swelling of the PEG film. In addition, PEG coatings are hydrogenated in a vacuum chamber. It is observed that the hydrogen has a preventing effect on the humidity induced phase change in PEG coatings. Finally, the possibility of using PEG coatings in construction of a real plastic fibre optic humidity sensor is discussed.
ISSN: 1340-6000
Appears in Collections:Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
1930.pdfMakale779.46 kBAdobe PDFThumbnail
Show full item record

CORE Recommender


checked on Mar 29, 2024


checked on Mar 27, 2024

Page view(s)

checked on Apr 22, 2024


checked on Apr 22, 2024

Google ScholarTM



Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.