Electrically Tuning Characteristics of LC Selectively Infiltrated PCF Sagnac Interferometer

Xue, Pingsheng, Liu, Qiang, Wu, Zhaoxia, Wu, Qiang, Zhao, Chenyu, Ng, Wai Pang, Fu, Richard and Binns, Richard (2021) Electrically Tuning Characteristics of LC Selectively Infiltrated PCF Sagnac Interferometer. IEEE Photonics Technology Letters, 33 (13). pp. 668-671. ISSN 1041-1135

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Official URL: https://doi.org/10.1109/lpt.2021.3086482

Abstract

A photonic crystal fiber was selectively infiltrated only two of the air holes near the core with liquid crystal. The selective infiltration caused geometric asymmetry and created high birefringence. Because of the geometric asymmetry, the response to varying electric field is concerned with electric field direction. A Sagnac interferometer was set to investigate the electric tuning characteristics of the selectively infiltrated photonic crystal fiber. The effective refractive-indices of the fiber varies with electric field due to reorientation of liquid crystal molecules. The highest sensitivity was 1.12 nm/V (504 nm/kV/mm) with tuning range of 7 nm when electric field direction was parallel to the connecting line of infiltrated holes. The response time of the selectively infiltrated photonic crystal fiber was studied. The device can be utilized as voltage sensors, electro-optical modulators and filters.

Item Type: Article
Additional Information: Funding information: This work was supported in part by the National Natural Science Foundation of China under Grant 51907017, in part by the Key Science and Technology Research Projects of Higher Education Institutions in Hebei Province of China under Grant ZD2019304, in part by the Hebei Natural Science Foundation under Grant F2020501040, and in part by the Fundamental Research Funds for the Central Universities of China under Grant N2123012.
Uncontrolled Keywords: Electric field sensing, Indexes, Interference, Liquid crystal, Modulators, Photonic crystal fiber, Refractive index, Sagnac interferometer, Sagnac interferometers, Sensitivity, Tuning, Voltage fluctuations
Subjects: F300 Physics
H600 Electronic and Electrical Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 18 Jun 2021 14:47
Last Modified: 18 Jun 2021 14:47
URI: http://nrl.northumbria.ac.uk/id/eprint/46488

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