Electrically Tuning Characteristics of LC Selectively Infiltrated PCF Sagnac Interferometer

Pingsheng Xue, Qiang Liu*, Zhaoxia Wu, Qiang Wu, Chenyu Zhao, Wai Pang Ng, Richard Fu, Richard Binns

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
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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.

Original languageEnglish
Pages (from-to)668-671
Number of pages4
JournalIEEE Photonics Technology Letters
Volume33
Issue number13
Early online date4 Jun 2021
DOIs
Publication statusPublished - 1 Jul 2021

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