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Proceedings Paper

Measuring of the pitch variation of cholesteric liquid crystals under electric field using wavelength-swept laser
Author(s): Myeong Ock Ko; Sung-Jo Kim; Jong-Hyun Kim; Min Yong Jeon
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Paper 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.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032345 (23 April 2017); doi: 10.1117/12.2265461
Show Author Affiliations
Myeong Ock Ko, Chungnam National Univ. (Korea, Republic of)
Sung-Jo Kim, Institute for Basic Science (Korea, Republic of)
Jong-Hyun Kim, Chungnam National Univ. (Korea, Republic of)
Min Yong Jeon, Chungnam National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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