@ARTICLE{Czapla_A._Electrically_2017,
 author={Czapla, A. and Bock, W.J. and Woliński, T.R. and Mikulic, P. and Dąbrowski, R. and Nowinowski-Kruszelnicki, E.},
 volume={vol. 25},
 number={No 4},
 journal={Opto-Electronics Review},
 pages={290-295},
 howpublished={online},
 year={2017},
 publisher={Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology},
 abstract={In this work, an electrically tunable long-period fiber grating (LPFG) coated with liquid crystal layer (LC) is presented. As a LC layer, a prototype low-birefringence 1550A LC mixture was chosen. As a LPFG host, two types of gratings were studied: the LPFGs based on a standard telecommunication fiber, produced by an electric arc technique with a period of 222 μm, and the LPFGs based on a boron co-doped fiber written by a UV technique with a period of 226.8 μm. The relatively short period of these gratings allowed exploiting unique sensing properties of the attenuation bands associated with modes close to the turn-around point. Experiments carried out showed that for the UV-induced LPFG with a LC layer, on the powered state the attenuation band could be offset from the attenuation band measured in the unpowered state by almost 130 nm. When the arc-induced LPFG was coated with the LC, the depth of the attenuation band could be efficiently controlled by applying an external E-field. Additionally, all experimental results obtained in this work were supported by the theoretical analysis based on a model developed with Optigrating v.4.2 software.},
 type={Article},
 title={Electrically tunable long-period fiber gratings with low-birefringence liquid crystal near the turn-around point},
 URL={http://www.journals.pan.pl/Content/115382/PDF/main.pdf},
 keywords={Long-period fiber grating, Liquid crystal, Sensors, Electric field},
}