Electric field sensor based on cholesteric liquid crystal Fabry-Perot etalon

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

doi:10.1117/12.2194275

28 September 2015 Electric field sensor based on cholesteric liquid crystal Fabry-Perot etalon

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

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96345S (2015) https://doi.org/10.1117/12.2194275
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

We propose an electric field sensor using a cholesteric liquid crystal (CLC) Fabry-Perot etalon and a broadband optical source. The CLC cell consists of glass substrates, polyimide layers, electrodes, and CLC layer. There is a threshold behavior for CLC cell and no change in the transmitted wavelength occurs until a threshold value. The threshold value is 0.8 V/μm for fabricated CLC cell in this experiment. The transmitted or reflected wavelength from the CLC Fabry-Perot etalon depends on the applied electric field. The valley wavelengths of the transmitted light from the CLC device are linearly increased from 1303 nm to 1317 nm as the applied electric field to the CLC device is increased from 0.8 V/μm to 1.9 V/μm.

Citation Download Citation

Myeong Ock Ko, Sung-Jo Kim, Jong-Hyun Kim, Bong Wan Lee, and Min Yong Jeon "Electric field sensor based on cholesteric liquid crystal Fabry-Perot etalon", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96345S (28 September 2015); https://doi.org/10.1117/12.2194275

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