Measuring of the pitch variation of cholesteric liquid crystals under electric field using wavelength-swept laser

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

doi:10.1117/12.2265461

23 April 2017 Measuring of the pitch variation of cholesteric liquid crystals under electric field using wavelength-swept laser

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

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032345 (2017) https://doi.org/10.1117/12.2265461
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We measure the pitch variation of cholesteric liquid crystals (CLCs) according to the applied electric field using a wavelength-swept laser. While the electric field is applied to the CLC, the pitch of the CLC is elongated normal to the direction of electric field. Therefore, the reflection band is shifted to the longer wavelength. When the applied electric field to the CLC cell was over 1.52 V/μm, the reflection band was changed to the longer wavelength of about 75.1 nm. We believe that the dynamic behavior of the CLC can be analyzed if a high-speed wavelength-swept laser is used as an optical source.

Citation Download Citation

Myeong Ock Ko, Sung-Jo Kim, Jong-Hyun Kim, and Min Yong Jeon "Measuring of the pitch variation of cholesteric liquid crystals under electric field using wavelength-swept laser", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032345 (23 April 2017); https://doi.org/10.1117/12.2265461

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