Improving the electric field sensing capabilities of the long-period fiber grating coated with a liquid crystal layer
Aleksandra Czapla , Wojtek J. Bock , Tomasz Woliński , P. Mikulic , E Nowinowski-Kruszelnicki , R. Dabrowski
AbstractThe hybrid liquid crystal long-period fiber grating structure presented here uses the 1702 liquid crystal as a thin layer on the bare longperiod fiber grating. To achieve the highest long-period fiber grating sensitivity to the liquid crystal layer presence, a UV-induced host grating, with a relatively short period of 226.8 um, was chosen. This design makes it possible to couple light from the propagating core mode to a cladding mode at a wavelength near the phase-matching turning point. This phenomenon is exploited here for the first time to measure the thermal and electric field responses of the liquid crystal long-period fiber grating structure. All experimental results achieved in this work are supported by theoretical analysis. © 2016 Optical Society of America.
|Journal series||Optics Express, ISSN 1094-4087 |
|Publication size in sheets||0.55|
|Keywords in English||Crystal structure; Electric fields; Fibers; Liquid crystals; Liquids; Phase matching, Cladding modes; Electric field response; Electric field sensing; Liquid crystal layers; Long period fiber grating; Phase-matching turning points; Short periods; Thin layers, Diffraction gratings|
|Score|| = 40.0, 28-11-2017, ArticleFromJournal|
= 45.0, 28-11-2017, ArticleFromJournal
|Publication indicators||: 2016 = 3.307 (2) - 2016=3.436 (5)|
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