Fiber optic dynamic electric field sensor based on nematic liquid crystal Fabry-Perot etalon

Myeong Ock Ko; Sung-Jo Kim; Jong-Hyun Kim; Min Yong Jeon

doi:10.1117/12.2059037

2 June 2014 Fiber optic dynamic electric field sensor based on nematic liquid crystal Fabry-Perot etalon

Myeong Ock Ko, Sung-Jo Kim, Jong-Hyun Kim, Min Yong Jeon

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91570W (2014) https://doi.org/10.1117/12.2059037
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

We propose a fiber-optic dynamic electric field sensor using a nematic liquid crystal (NLC) Fabry-Perot etalon and a wavelength-swept laser. The transmission wavelength of the NLC Fabry-Perot etalon depends on the applied electric field intensity. The change in the effective refractive index of the NLC is measured while changing the applied electric field intensity. It decreases from 1.67 to 1.51 as the applied the electric field intensity is increased. Additionally, we successfully measure the dynamic variation of the electric field using the high-speed wavelength-swept laser. By measuring the modulation frequency of the transmission peaks in the temporal domain, the frequency of the modulated electric field can be estimated.

Citation Download Citation

Myeong Ock Ko, Sung-Jo Kim, Jong-Hyun Kim, and Min Yong Jeon "Fiber optic dynamic electric field sensor based on nematic liquid crystal Fabry-Perot etalon", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91570W (2 June 2014); https://doi.org/10.1117/12.2059037

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