Fiber optic temperature sensor using a fiber ferrule-based cholesteric liquid crystal cell

Soyeon Ahn; Gi Hyen Lee; Young Seo Kim; Ji Yeon Yang; Na-Hyun Bak; Byeong Kwon Choi; Srinivas Pagidi; Moon-Deock Kim; Jong-Hyun Kim; Min Yong Jeon

doi:10.1117/12.2612562

7 March 2022 Fiber optic temperature sensor using a fiber ferrule-based cholesteric liquid crystal cell

Soyeon Ahn, Gi Hyen Lee, Young Seo Kim, Ji Yeon Yang, Na-Hyun Bak, Byeong Kwon Choi, Srinivas Pagidi, Moon-Deock Kim, Jong-Hyun Kim, Min Yong Jeon

Author Affiliations +

Proceedings Volume PC12023, Emerging Liquid Crystal Technologies XVII; PC120230F (2022) https://doi.org/10.1117/12.2612562
Event: SPIE OPTO, 2022, San Francisco, California, United States

Conference Poster

Abstract

In this study, we report the results of confirming the possibility of optical fiber temperature sensors by fabricating cholesteric liquid crystal (CLC) cells combined with optical fibers. The CLC cell was fabricated with a Fabry-Perot etalon using the cross-sections of two optical fiber ferrules as substrates. A 1.2 um wide bandwidth wavelength swept laser was used to measure the spectrum change of the CLC cell according to the applied temperature. The reflection spectra were measured by changing the temperature of the CLC cell at intervals of 2o from 23o to 45o, and it was confirmed that the reflection band shifted discontinuously to a shorter wavelength as the temperature increased.

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Soyeon Ahn, Gi Hyen Lee, Young Seo Kim, Ji Yeon Yang, Na-Hyun Bak, Byeong Kwon Choi, Srinivas Pagidi, Moon-Deock Kim, Jong-Hyun Kim, and Min Yong Jeon "Fiber optic temperature sensor using a fiber ferrule-based cholesteric liquid crystal cell", Proc. SPIE PC12023, Emerging Liquid Crystal Technologies XVII, PC120230F (7 March 2022); https://doi.org/10.1117/12.2612562

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