Title :
Fiber-optic electric field sensor based on wavelength-swept laser
Author :
Myeong Ock Ko ; Sung-Jo Kim ; Jong-Hyun Kim ; Min Yong Jeon ; Bong Wan Lee
Author_Institution :
Dept. of Phys., Chungnam Nat. Univ., Daejeon, South Korea
fDate :
June 30 2014-July 4 2014
Abstract :
We report a dynamic fiber-optic electric field sensor using a nematic liquid crystal (LNC) Fabry-Perot etalon and a wavelength-swept laser (WSL). The WSL has a linear relationship between the wavelength measurement and the time measurement. When a modulated electric field of the proper amplitude and frequency is applied to the NLC, the transmission wavelength peaks for the ordinary mode are maintained, while the transmission peaks for the extraordinary mode are modulated. By measuring the modulation frequency of the transmission peaks in the temporal domain, the frequency of the modulated electric field could be estimated.
Keywords :
Fabry-Perot interferometers; electric field measurement; fibre optic sensors; liquid crystal devices; measurement by laser beam; nematic liquid crystals; optical modulation; dynamic fiber-optic electric field sensor; modulated electric field; modulation frequency; nematic liquid crystal Fabry-Perot etalon; temporal domain; time measurement; transmission wavelength; wavelength measurement; wavelength-swept laser; Frequency modulation; Frequency-domain analysis; Training; Wavelength measurement; electric field sensor; nematic liquid crystal; wavelength-swept laser;
Conference_Titel :
Laser Optics, 2014 International Conference
Conference_Location :
Saint Petersburg
Print_ISBN :
978-1-4799-3884-1
DOI :
10.1109/LO.2014.6886371
